diff --git a/src/components/list/partials/filter-popup.vue b/src/components/list/partials/filter-popup.vue
index 20d57ca58..7220735ba 100644
--- a/src/components/list/partials/filter-popup.vue
+++ b/src/components/list/partials/filter-popup.vue
@@ -20,7 +20,7 @@
 		:overflow="true"
 		variant="hint-modal"
 	>
-		<filters
+		<Filters
 			:has-title="true"
 			v-model="value"
 			ref="filters"
@@ -30,14 +30,16 @@
 </template>
 
 <script setup lang="ts">
-import {computed, ref, watch} from 'vue'
+import {computed, ref, watch, type PropType} from 'vue'
 
 import Filters from '@/components/list/partials/filters.vue'
 
 import {getDefaultParams} from '@/composables/taskList'
+import type {IParams} from '@/types/IParams'
 
 const	props = defineProps({
 	modelValue: {
+		type: Object as PropType<IParams>,
 		required: true,
 	},
 })
@@ -63,15 +65,15 @@ watch(
 const hasFilters = computed(() => {
 	// this.value also contains the page parameter which we don't want to include in filters
 	// eslint-disable-next-line no-unused-vars
-	const {filter_by, filter_value, filter_comparator, filter_concat, s} = value.value
+	const {filterBy, filterValue, filterComparator, filterConcat, s} = value.value
 	const def = {...getDefaultParams()}
 
-	const params = {filter_by, filter_value, filter_comparator, filter_concat, s}
+	const params = {filterBy, filterValue, filterComparator, filterConcat, s}
 	const defaultParams = {
-		filter_by: def.filter_by,
-		filter_value: def.filter_value,
-		filter_comparator: def.filter_comparator,
-		filter_concat: def.filter_concat,
+		filterBy: def.filterBy,
+		filterValue: def.filterValue,
+		filterComparator: def.filterComparator,
+		filterConcat: def.filterConcat,
 		s: s ? def.s : undefined,
 	}
 
diff --git a/src/components/list/partials/filters.vue b/src/components/list/partials/filters.vue
index f02d5a07d..ef09bbfed 100644
--- a/src/components/list/partials/filters.vue
+++ b/src/components/list/partials/filters.vue
@@ -2,7 +2,7 @@
 	<card class="filters has-overflow" :title="hasTitle ? $t('filters.title') : ''">
 		<div class="field is-flex is-flex-direction-column">
 			<fancycheckbox
-				v-model="params.filter_include_nulls"
+				v-model="params.filterIncludeNulls"
 				@update:model-value="change()"
 			>
 				{{ $t('filters.attributes.includeNulls') }}
@@ -39,84 +39,87 @@
 		<div class="field">
 			<label class="label">{{ $t('task.attributes.priority') }}</label>
 			<div class="control single-value-control">
+				<fancycheckbox
+					v-model="filters.usePriority"
+					@update:model-value="setPriority"
+					:title="$t('filters.attributes.enablePriority')"
+				/>
 				<priority-select
 					:disabled="!filters.usePriority || undefined"
 					v-model.number="filters.priority"
 					@update:model-value="setPriority"
 				/>
-				<fancycheckbox
-					v-model="filters.usePriority"
-					@update:model-value="setPriority"
-				>
-					{{ $t('filters.attributes.enablePriority') }}
-				</fancycheckbox>
 			</div>
 		</div>
 		<div class="field">
 			<label class="label">{{ $t('task.attributes.percentDone') }}</label>
 			<div class="control single-value-control">
+				<fancycheckbox
+					v-model="filters.usePercentDone"
+					@update:model-value="setPercentDoneFilter"
+					:title="$t('filters.attributes.enablePercentDone')"
+				/>
 				<percent-done-select
 					v-model.number="filters.percentDone"
 					@update:model-value="setPercentDoneFilter"
 					:disabled="!filters.usePercentDone || undefined"
 				/>
-				<fancycheckbox
-					v-model="filters.usePercentDone"
-					@update:model-value="setPercentDoneFilter"
-				>
-					{{ $t('filters.attributes.enablePercentDone') }}
-				</fancycheckbox>
 			</div>
 		</div>
 		<div class="field">
 			<label class="label">{{ $t('task.attributes.dueDate') }}</label>
 			<div class="control">
-				<datepicker-with-range
+				<DatepickerWithRange
 					v-model="filters.dueDate"
-					@update:model-value="values => setDateFilter('due_date', values)"
+					@update:model-value="values => setDateFilter('dueDate', values)"
 				>
 					<template #trigger="{toggle, buttonText}">
-						<x-button @click.prevent.stop="toggle()" variant="secondary" :shadow="false" class="mb-2">
+						<x-button
+							class="mb-2"
+							@click.prevent.stop="toggle()"
+							variant="secondary"
+							:shadow="false"
+						>
 							{{ buttonText }}
 						</x-button>
 					</template>
-				</datepicker-with-range>
+				</DatepickerWithRange>
 			</div>
 		</div>
 		<div class="field">
 			<label class="label">{{ $t('task.attributes.startDate') }}</label>
 			<div class="control">
-				<datepicker-with-range
+				<DatepickerWithRange
 					v-model="filters.startDate"
-					@update:model-value="values => setDateFilter('start_date', values)"
+					@update:model-value="values => setDateFilter('startDate', values)"
 				>
 					<template #trigger="{toggle, buttonText}">
 						<x-button @click.prevent.stop="toggle()" variant="secondary" :shadow="false" class="mb-2">
 							{{ buttonText }}
 						</x-button>
 					</template>
-				</datepicker-with-range>
+				</DatepickerWithRange>
 			</div>
 		</div>
 		<div class="field">
 			<label class="label">{{ $t('task.attributes.endDate') }}</label>
 			<div class="control">
-				<datepicker-with-range
+				<DatepickerWithRange
 					v-model="filters.endDate"
-					@update:model-value="values => setDateFilter('end_date', values)"
+					@update:model-value="values => setDateFilter('endDate', values)"
 				>
 					<template #trigger="{toggle, buttonText}">
 						<x-button @click.prevent.stop="toggle()" variant="secondary" :shadow="false" class="mb-2">
 							{{ buttonText }}
 						</x-button>
 					</template>
-				</datepicker-with-range>
+				</DatepickerWithRange>
 			</div>
 		</div>
 		<div class="field">
 			<label class="label">{{ $t('task.attributes.reminders') }}</label>
 			<div class="control">
-				<datepicker-with-range
+				<DatepickerWithRange
 					v-model="filters.reminders"
 					@update:model-value="values => setDateFilter('reminders', values)"
 				>
@@ -125,7 +128,7 @@
 							{{ buttonText }}
 						</x-button>
 					</template>
-				</datepicker-with-range>
+				</DatepickerWithRange>
 			</div>
 		</div>
 
@@ -133,15 +136,15 @@
 			<label class="label">{{ $t('task.attributes.assignees') }}</label>
 			<div class="control">
 				<multiselect
-					:loading="usersService.loading"
+					:loading="service.user.loading"
 					:placeholder="$t('team.edit.search')"
-					@search="query => find('users', query)"
-					:search-results="foundusers"
-					@select="() => add('users', 'assignees')"
+					@search="query => find('user', query)"
+					:search-results="foundEntities.user"
+					@select="() => add('user', 'assignees')"
 					label="username"
 					:multiple="true"
-					@remove="() => remove('users', 'assignees')"
-					v-model="users"
+					@remove="() => remove('user', 'assignees')"
+					v-model="entities.user"
 				/>
 			</div>
 		</div>
@@ -149,7 +152,7 @@
 		<div class="field">
 			<label class="label">{{ $t('task.attributes.labels') }}</label>
 			<div class="control labels-list">
-				<edit-labels v-model="labels" @update:model-value="changeLabelFilter"/>
+				<edit-labels v-model="entities.label" @update:model-value="changeLabelFilter"/>
 			</div>
 		</div>
 
@@ -159,15 +162,15 @@
 				<label class="label">{{ $t('list.lists') }}</label>
 				<div class="control">
 					<multiselect
-						:loading="listsService.loading"
+						:loading="service.list.loading"
 						:placeholder="$t('list.search')"
-						@search="query => find('lists', query)"
-						:search-results="foundlists"
-						@select="() => add('lists', 'list_id')"
+						@search="query => find('list', query)"
+						:search-results="foundEntities.list"
+						@select="() => add('list', 'listId')"
 						label="title"
-						@remove="() => remove('lists', 'list_id')"
+						@remove="() => remove('list', 'listId')"
 						:multiple="true"
-						v-model="lists"
+						v-model="entities.list"
 					/>
 				</div>
 			</div>
@@ -175,15 +178,15 @@
 				<label class="label">{{ $t('namespace.namespaces') }}</label>
 				<div class="control">
 					<multiselect
-						:loading="namespaceService.loading"
+						:loading="service.namespace.loading"
 						:placeholder="$t('namespace.search')"
 						@search="query => find('namespace', query)"
-						:search-results="foundnamespace"
+						:search-results="foundEntities.namespace"
 						@select="() => add('namespace', 'namespace')"
 						label="title"
 						@remove="() => remove('namespace', 'namespace')"
 						:multiple="true"
-						v-model="namespace"
+						v-model="entities.namespace"
 					/>
 				</div>
 			</div>
@@ -192,437 +195,461 @@
 </template>
 
 <script lang="ts">
-import {defineComponent} from 'vue'
+export const ALPHABETICAL_SORT = 'title'
+</script>
 
-import {useLabelStore} from '@/stores/labels'
+<script setup lang="ts">
+import {computed, nextTick, onMounted, reactive, ref, shallowReactive, toRefs, watch} from 'vue'
 
 import DatepickerWithRange from '@/components/date/datepickerWithRange.vue'
+import EditLabels from '@/components/tasks/partials/editLabels.vue'
 import Fancycheckbox from '@/components/input/fancycheckbox.vue'
-
-import {includesById} from '@/helpers/utils'
-import PrioritySelect from '@/components/tasks/partials/prioritySelect.vue'
-import PercentDoneSelect from '@/components/tasks/partials/percentDoneSelect.vue'
 import Multiselect from '@/components/input/multiselect.vue'
-import {parseDateOrString} from '@/helpers/time/parseDateOrString'
+import PercentDoneSelect from '@/components/tasks/partials/percentDoneSelect.vue'
+import PrioritySelect from '@/components/tasks/partials/prioritySelect.vue'
 
 import UserService from '@/services/user'
 import ListService from '@/services/list'
 import NamespaceService from '@/services/namespace'
-import EditLabels from '@/components/tasks/partials/editLabels.vue'
 
-import {objectToSnakeCase} from '@/helpers/case'
+import {parseDateOrString} from '@/helpers/time/parseDateOrString'
+import {includesById} from '@/helpers/utils'
+import {objectToCamelCase} from '@/helpers/case'
 import {getDefaultParams} from '@/composables/taskList'
-import {camelCase} from 'camel-case'
+
+import {useLabelStore} from '@/stores/labels'
+
+import type {IUser} from '@/modelTypes/IUser'
+import type {ILabel} from '@/modelTypes/ILabel'
+import type {IList} from '@/modelTypes/IList'
+import type {INamespace} from '@/modelTypes/INamespace'
+import type {IParams, FilterBy, FilterComparator, FilterValue} from '@/types/IParams'
+import type {IFilter, IFilterKey} from '@/types/IFilter'
 
 // FIXME: merge with DEFAULT_PARAMS in taskList.js
-const DEFAULT_PARAMS = {
-	sort_by: [],
-	order_by: [],
-	filter_by: [],
-	filter_value: [],
-	filter_comparator: [],
-	filter_include_nulls: true,
-	filter_concat: 'or',
+const DEFAULT_PARAMS: IParams = {
+	sortBy: [],
+	orderBy: [],
+	filterBy: [],
+	filterValue: [],
+	filterComparator: [],
+	filterIncludeNulls: true,
+	filterConcat: 'or',
 	s: '',
 }
 
-const DEFAULT_FILTERS = {
+const DEFAULT_FILTERS: IFilter = {
 	done: false,
 	dueDate: '',
-	requireAllFilters: false,
 	priority: 0,
-	usePriority: false,
 	startDate: '',
 	endDate: '',
 	percentDone: 0,
-	usePercentDone: false,
 	reminders: '',
 	assignees: '',
 	labels: '',
-	list_id: '',
+	listId: '',
 	namespace: '',
-}
+	
+	requireAllFilters: false,
+	
+	usePercentDone: false,
+	usePriority: false,
+} as const
 
-export const ALPHABETICAL_SORT = 'title'
-
-export default defineComponent({
-	name: 'filters',
-	components: {
-		DatepickerWithRange,
-		EditLabels,
-		PrioritySelect,
-		Fancycheckbox,
-		PercentDoneSelect,
-		Multiselect,
+const props = defineProps({
+	modelValue: {
+		required: true,
 	},
-	data() {
-		return {
-			params: DEFAULT_PARAMS,
-			filters: DEFAULT_FILTERS,
-
-			usersService: new UserService(),
-			foundusers: [],
-			users: [],
-
-			labelQuery: '',
-			labels: [],
-
-			listsService: new ListService(),
-			foundlists: [],
-			lists: [],
-
-			namespaceService: new NamespaceService(),
-			foundnamespace: [],
-			namespace: [],
-		}
-	},
-	mounted() {
-		this.filters.requireAllFilters = this.params.filter_concat === 'and'
-	},
-	props: {
-		modelValue: {
-			required: true,
-		},
-		hasTitle: {
-			type: Boolean,
-			default: false,
-		},
-	},
-	emits: ['update:modelValue'],
-	watch: {
-		modelValue: {
-			handler(value) {
-				// FIXME: filters should only be converted to snake case in
-				// the last moment
-				this.params = objectToSnakeCase(value)
-				this.prepareFilters()
-			},
-			immediate: true,
-		},
-	},
-	computed: {
-		sortAlphabetically: {
-			get() {
-				return this.params?.sort_by?.find(sortBy => sortBy === ALPHABETICAL_SORT) !== undefined
-			},
-			set(sortAlphabetically) {
-				this.params.sort_by = sortAlphabetically
-					? [ALPHABETICAL_SORT]
-					: getDefaultParams().sort_by
-
-				this.change()
-			},
-		},
-
-		foundLabels() {
-			const labelStore = useLabelStore()
-			return labelStore.filterLabelsByQuery(this.labels, this.labelQuery)
-		},
-	},
-	methods: {
-		change() {
-			const params = {...this.params}
-			params.filter_value = params.filter_value.map(v => v instanceof Date ? v.toISOString() : v)
-			this.$emit('update:modelValue', params)
-		},
-		prepareFilters() {
-			this.prepareDone()
-			this.prepareDate('due_date', 'dueDate')
-			this.prepareDate('start_date', 'startDate')
-			this.prepareDate('end_date', 'endDate')
-			this.prepareSingleValue('priority', 'priority', 'usePriority', true)
-			this.prepareSingleValue('percent_done', 'percentDone', 'usePercentDone', true)
-			this.prepareDate('reminders')
-			this.prepareRelatedObjectFilter('users', 'assignees')
-			this.prepareRelatedObjectFilter('lists', 'list_id')
-			this.prepareRelatedObjectFilter('namespace')
-
-			this.prepareSingleValue('labels')
-
-			const labels = typeof this.filters.labels === 'string'
-				? this.filters.labels
-				: ''
-			const labelIds = labels.split(',').map(i => parseInt(i))
-
-			const labelStore = useLabelStore()
-			this.labels = labelStore.getLabelsByIds(labelIds)
-		},
-		removePropertyFromFilter(propertyName) {
-			// Because of the way arrays work, we can only ever remove one element at once.
-			// To remove multiple filter elements of the same name this function has to be called multiple times.
-			for (const i in this.params.filter_by) {
-				if (this.params.filter_by[i] === propertyName) {
-					this.params.filter_by.splice(i, 1)
-					this.params.filter_comparator.splice(i, 1)
-					this.params.filter_value.splice(i, 1)
-					break
-				}
-			}
-		},
-		setDateFilter(filterName, {dateFrom, dateTo}) {
-			dateFrom = parseDateOrString(dateFrom, null)
-			dateTo = parseDateOrString(dateTo, null)
-
-			// Only filter if we have a date
-			if (dateFrom !== null && dateTo !== null) {
-
-				// Check if we already have values in params and only update them if we do
-				let foundStart = false
-				let foundEnd = false
-				this.params.filter_by.forEach((f, i) => {
-					if (f === filterName && this.params.filter_comparator[i] === 'greater_equals') {
-						foundStart = true
-						this.params.filter_value[i] = dateFrom
-					}
-					if (f === filterName && this.params.filter_comparator[i] === 'less_equals') {
-						foundEnd = true
-						this.params.filter_value[i] = dateTo
-					}
-				})
-
-				if (!foundStart) {
-					this.params.filter_by.push(filterName)
-					this.params.filter_comparator.push('greater_equals')
-					this.params.filter_value.push(dateFrom)
-				}
-				if (!foundEnd) {
-					this.params.filter_by.push(filterName)
-					this.params.filter_comparator.push('less_equals')
-					this.params.filter_value.push(dateTo)
-				}
-
-				this.filters[camelCase(filterName)] = {dateFrom, dateTo}
-				this.change()
-				return
-			}
-
-			this.removePropertyFromFilter(filterName)
-			this.removePropertyFromFilter(filterName)
-			this.change()
-		},
-		prepareDate(filterName, variableName) {
-			if (typeof this.params.filter_by === 'undefined') {
-				return
-			}
-
-			let foundDateStart = false
-			let foundDateEnd = false
-			for (const i in this.params.filter_by) {
-				if (this.params.filter_by[i] === filterName && this.params.filter_comparator[i] === 'greater_equals') {
-					foundDateStart = i
-				}
-				if (this.params.filter_by[i] === filterName && this.params.filter_comparator[i] === 'less_equals') {
-					foundDateEnd = i
-				}
-
-				if (foundDateStart !== false && foundDateEnd !== false) {
-					break
-				}
-			}
-
-			if (foundDateStart !== false && foundDateEnd !== false) {
-				const startDate = new Date(this.params.filter_value[foundDateStart])
-				const endDate = new Date(this.params.filter_value[foundDateEnd])
-				this.filters[variableName] = {
-					dateFrom: !isNaN(startDate)
-						? `${startDate.getFullYear()}-${startDate.getMonth() + 1}-${startDate.getDate()}`
-						: this.params.filter_value[foundDateStart],
-					dateTo: !isNaN(endDate)
-						? `${endDate.getFullYear()}-${endDate.getMonth() + 1}-${endDate.getDate()}`
-						: this.params.filter_value[foundDateEnd],
-				}
-			}
-		},
-		setSingleValueFilter(filterName, variableName, useVariableName = '', comparator = 'equals') {
-			if (useVariableName !== '' && !this.filters[useVariableName]) {
-				this.removePropertyFromFilter(filterName)
-				return
-			}
-
-			let found = false
-			this.params.filter_by.forEach((f, i) => {
-				if (f === filterName) {
-					found = true
-					this.params.filter_value[i] = this.filters[variableName]
-				}
-			})
-
-			if (!found) {
-				this.params.filter_by.push(filterName)
-				this.params.filter_comparator.push(comparator)
-				this.params.filter_value.push(this.filters[variableName])
-			}
-
-			this.change()
-		},
-		/**
-		 *
-		 * @param filterName The filter name in the api.
-		 * @param variableName The name of the variable in this.filters.
-		 * @param useVariableName The name of the variable of the "Use this filter" variable. Will only be set if the parameter is not null.
-		 * @param isNumber Toggles if the value should be parsed as a number.
-		 */
-		prepareSingleValue(filterName, variableName = null, useVariableName = null, isNumber = false) {
-			if (variableName === null) {
-				variableName = filterName
-			}
-
-			let found = false
-			for (const i in this.params.filter_by) {
-				if (this.params.filter_by[i] === filterName) {
-					found = i
-					break
-				}
-			}
-
-			if (found === false && useVariableName !== null) {
-				this.filters[useVariableName] = false
-				return
-			}
-
-			if (isNumber) {
-				this.filters[variableName] = Number(this.params.filter_value[found])
-			} else {
-				this.filters[variableName] = this.params.filter_value[found]
-			}
-
-			if (useVariableName !== null) {
-				this.filters[useVariableName] = true
-			}
-		},
-		prepareDone() {
-			// Set filters.done based on params
-			if (typeof this.params.filter_by === 'undefined') {
-				return
-			}
-
-			this.filters.done = this.params.filter_by.some((f) => f === 'done') === false
-		},
-		async prepareRelatedObjectFilter(kind, filterName = null, servicePrefix = null) {
-			if (filterName === null) {
-				filterName = kind
-			}
-
-			if (servicePrefix === null) {
-				servicePrefix = kind
-			}
-
-			this.prepareSingleValue(filterName)
-			if (typeof this.filters[filterName] === 'undefined' || this.filters[filterName] === '') {
-				return
-			}
-			
-			// Don't load things if we already have something loaded.
-			// This is not the most ideal solution because it prevents a re-population when filters are changed 
-			// from the outside. It is still fine because we're not changing them from the outside, other than 
-			// loading them initially.
-			if(this[kind].length > 0) {
-				return
-			}
-
-			this[kind] = await this[`${servicePrefix}Service`].getAll({}, {s: this.filters[filterName]})
-		},
-		setDoneFilter() {
-			if (this.filters.done) {
-				this.removePropertyFromFilter('done')
-			} else {
-				this.params.filter_by.push('done')
-				this.params.filter_comparator.push('equals')
-				this.params.filter_value.push('false')
-			}
-			this.change()
-		},
-		setFilterConcat() {
-			if (this.filters.requireAllFilters) {
-				this.params.filter_concat = 'and'
-			} else {
-				this.params.filter_concat = 'or'
-			}
-			this.change()
-		},
-		setPriority() {
-			this.setSingleValueFilter('priority', 'priority', 'usePriority')
-		},
-		setPercentDoneFilter() {
-			this.setSingleValueFilter('percent_done', 'percentDone', 'usePercentDone')
-		},
-		clear(kind) {
-			this[`found${kind}`] = []
-		},
-		async find(kind, query) {
-
-			if (query === '') {
-				this.clear(kind)
-				return
-			}
-
-			const response = await this[`${kind}Service`].getAll({}, {s: query})
-
-			// Filter users from the results who are already assigned
-			this[`found${kind}`] = response.filter(({id}) => !includesById(this[kind], id))
-		},
-		add(kind, filterName) {
-			this.$nextTick(() => {
-				this.changeMultiselectFilter(kind, filterName)
-			})
-		},
-		remove(kind, filterName) {
-			this.$nextTick(() => {
-				this.changeMultiselectFilter(kind, filterName)
-			})
-		},
-		changeMultiselectFilter(kind, filterName) {
-			if (this[kind].length === 0) {
-				this.removePropertyFromFilter(filterName)
-				this.change()
-				return
-			}
-
-			let ids = []
-			this[kind].forEach(u => {
-				ids.push(kind === 'users' ? u.username : u.id)
-			})
-
-			this.filters[filterName] = ids.join(',')
-			this.setSingleValueFilter(filterName, filterName, '', 'in')
-		},
-		findLabels(query) {
-			this.labelQuery = query
-		},
-		addLabel() {
-			this.$nextTick(() => {
-				this.changeLabelFilter()
-			})
-		},
-		removeLabel(label) {
-			this.$nextTick(() => {
-				for (const l in this.labels) {
-					if (this.labels[l].id === label.id) {
-						this.labels.splice(l, 1)
-					}
-					break
-				}
-
-				this.changeLabelFilter()
-			})
-		},
-		changeLabelFilter() {
-			if (this.labels.length === 0) {
-				this.removePropertyFromFilter('labels')
-				this.change()
-				return
-			}
-
-			let labelIDs = []
-			this.labels.forEach(u => {
-				labelIDs.push(u.id)
-			})
-
-			this.filters.labels = labelIDs.join(',')
-			this.setSingleValueFilter('labels', 'labels', '', 'in')
-		},
+	hasTitle: {
+		type: Boolean,
+		default: false,
 	},
 })
+
+const emit = defineEmits(['update:modelValue'])
+
+const labelStore = useLabelStore()
+
+const params = ref<IParams>(DEFAULT_PARAMS)
+const filters = ref<IFilter>(DEFAULT_FILTERS)
+
+const labelQuery = ref('')
+
+interface Entities {
+	user: IUser[]
+	label: ILabel[]
+	list: IList[]
+	namespace: INamespace[]
+}
+
+type EntityKind = keyof Entities
+
+const entities: Entities = reactive({
+	user: [],
+	label: [],
+	list: [],
+	namespace: [],
+})
+
+interface FoundEntities extends Entities {}
+
+const foundEntities: FoundEntities = reactive({
+	user: [],
+	// FIXME: this is readonly and thus cannot be cleared
+	label: computed(() => labelStore.filterLabelsByQuery(entities.label, labelQuery.value)),
+	list: [],
+	namespace: [],
+})
+
+const service = reactive({
+	user: shallowReactive(new UserService()),
+	list: shallowReactive(new ListService()),
+	namespace: shallowReactive(new NamespaceService()),
+})
+
+type ServiceKind = keyof typeof service
+
+onMounted(() => {
+	filters.value.requireAllFilters = params.value.filterConcat === 'and'
+})
+
+const {modelValue} = toRefs(props)
+
+watch(
+	modelValue,
+	(value) => {
+		// FIXME: this is just a precaution in case some values are not in camelcase yet
+		params.value = objectToCamelCase(value)
+		prepareFilters()
+	},
+	{immediate: true},
+)
+
+
+const sortAlphabetically = computed({
+	get() {
+		return params.value?.sortBy?.find(sortBy => sortBy === ALPHABETICAL_SORT) !== undefined
+	},
+	set(sortAlphabetically) {
+		params.value.sortBy = sortAlphabetically
+			? [ALPHABETICAL_SORT]
+			: getDefaultParams().sortBy
+
+		change()
+	},
+})
+
+function change() {
+	const newParams: IParams = {...params.value}
+	newParams.filterValue = newParams.filterValue.map(v => v instanceof Date ? v.toISOString() : v)
+	// FIXME: use underscore case for emitting
+	// take also care of values like filterComparator
+	emit('update:modelValue', newParams)
+}
+
+function prepareFilters() {
+	prepareDone()
+	prepareDate('dueDate', 'dueDate')
+	prepareDate('startDate', 'startDate')
+	prepareDate('endDate', 'endDate')
+	prepareSingleValue('priority', 'priority', 'usePriority', true)
+	prepareSingleValue('percentDone', 'percentDone', 'usePercentDone', true)
+	prepareDate('reminders', 'reminders')
+	prepareRelatedObjectFilter('user', 'assignees')
+	prepareRelatedObjectFilter('list', 'listId')
+	prepareRelatedObjectFilter('namespace', 'namespace')
+
+	prepareSingleValue('labels')
+
+	const labelString = typeof filters.value.labels === 'string'
+		? filters.value.labels
+		: ''
+	const labelIds = labelString.split(',').map(i => Number(i))
+
+	entities.label = labelStore.getLabelsByIds(labelIds)
+}
+
+function removeFilterProperty(propertyName: FilterBy) {
+	// Because of the way arrays work, we can only ever remove one element at once.
+	// To remove multiple filter elements of the same name this function has to be called multiple times.
+	params.value.filterBy.find((current, index) => {
+		if (current === propertyName) {
+			params.value.filterBy.splice(index, 1)
+			params.value.filterComparator.splice(index, 1)
+			params.value.filterValue.splice(index, 1)
+			return true
+		}
+	})
+}
+
+function addFilterProperty(
+	filterBy: FilterBy,
+	filterComparator: FilterComparator,
+	filterValue: FilterValue,
+) {
+	params.value.filterBy.push(filterBy)
+	params.value.filterComparator.push(filterComparator)
+	params.value.filterValue.push(filterValue)
+}
+
+function setDateFilter(filterName: FilterBy, dateRange: {dateFrom: string, dateTo: string}) {
+	const dateFrom = parseDateOrString(dateRange.dateFrom, null)
+	const dateTo = parseDateOrString(dateRange.dateTo, null)
+
+	// Only filter if we have a date
+	if (dateFrom !== null && dateTo !== null) {
+
+		// Check if we already have values in params and only update them if we do
+		let foundStart = false
+		let foundEnd = false
+		params.value.filterBy.forEach((filterBy, index) => {
+			if (filterBy === filterName && params.value.filterComparator[index] === 'greaterEquals') {
+				foundStart = true
+				params.value.filterValue[index] = dateFrom
+			}
+			if (filterBy === filterName && params.value.filterComparator[index] === 'lessEquals') {
+				foundEnd = true
+				params.value.filterValue[index] = dateTo
+			}
+		})
+
+		if (!foundStart) {
+			addFilterProperty(filterName, 'greaterEquals', dateFrom)
+		}
+		if (!foundEnd) {
+			addFilterProperty(filterName, 'lessEquals', dateTo)
+		}
+
+		filters.value[filterName] = {dateFrom, dateTo}
+		change()
+		return
+	}
+
+	removeFilterProperty(filterName)
+	removeFilterProperty(filterName)
+	change()
+}
+
+function prepareDate(filterName: FilterBy, variableName: IFilterKey) {
+	if (typeof params.value.filterBy === 'undefined') {
+		return
+	}
+
+	let foundDateStart : false | number = false
+	let foundDateEnd : false | number = false
+	params.value.filterBy.find((currentFilterBy, index) => {
+		if (
+				currentFilterBy === filterName &&
+				params.value.filterComparator[index] === 'greaterEquals'
+			) {
+			foundDateStart = index
+		}
+		if (
+			currentFilterBy === filterName &&
+			params.value.filterComparator[index] === 'lessEquals'
+		) {
+			foundDateEnd = index
+		}
+
+		if (foundDateStart !== false && foundDateEnd !== false) {
+			return true
+		}
+	})
+
+	if (foundDateStart !== false && foundDateEnd !== false) {
+		const startDate = new Date(params.value.filterValue[foundDateStart])
+		const endDate = new Date(params.value.filterValue[foundDateEnd])
+		filters.value[filterName] = {
+			dateFrom: !isNaN(startDate)
+				? `${startDate.getFullYear()}-${startDate.getMonth() + 1}-${startDate.getDate()}`
+				: params.value.filterValue[foundDateStart],
+			dateTo: !isNaN(endDate)
+				? `${endDate.getFullYear()}-${endDate.getMonth() + 1}-${endDate.getDate()}`
+				: params.value.filterValue[foundDateEnd],
+		}
+	}
+}
+
+function setSingleValueFilter(
+	filterName: FilterBy,
+	variableName: IFilterKey,
+	useVariableName: IFilterKey | '' = '',
+	comparator: FilterComparator = 'equals',
+) {
+	if (useVariableName !== '' && !filters.value[useVariableName]) {
+		removeFilterProperty(filterName)
+		return
+	}
+
+	let found = false
+	params.value.filterBy.forEach((f, index) => {
+		if (f === filterName) {
+			found = true
+			params.value.filterValue[index] = filters.value[variableName]
+		}
+	})
+
+	if (!found) {
+		addFilterProperty(filterName, comparator, filters.value[variableName])
+	}
+
+	change()
+}
+
+/**
+ *
+ * @param filterName The filter name in the api.
+ * @param variableName The name of the variable in filters.value.
+ * @param useVariableName The name of the variable of the "Use this filter" variable. Will only be set if the parameter is not null.
+ * @param isNumber Toggles if the value should be parsed as a number.
+ */
+function prepareSingleValue(
+	filterName: FilterBy,
+	variableName: string | null = null,
+	useVariableName: IFilterKey | null = null,
+	isNumber = false,
+) {
+	if (variableName === null) {
+		variableName = filterName
+	}
+
+	let found: number | false= false
+	for (const i in params.value.filterBy) {
+		if (params.value.filterBy[i] === filterName) {
+			found = i
+			break
+		}
+	}
+
+	if (found === false && useVariableName !== null) {
+		filters.value[useVariableName] = false
+		return
+	}
+
+	if (isNumber) {
+		filters.value[variableName] = Number(params.value.filterValue[found])
+	} else {
+		filters.value[variableName] = params.value.filterValue[found]
+	}
+
+	if (useVariableName !== null) {
+		filters.value[useVariableName] = true
+	}
+}
+
+function prepareDone() {
+	// Set filters.done based on params
+	if (typeof params.value.filterBy === 'undefined') {
+		return
+	}
+
+	filters.value.done = params.value.filterBy.some((f) => f === 'done') === false
+}
+
+async function prepareRelatedObjectFilter(
+	kind: EntityKind,
+	filterName: FilterBy,
+	servicePrefix: ServiceKind | null = null,
+) {
+	if (servicePrefix === null) {
+		servicePrefix = kind as ServiceKind
+	}
+
+	prepareSingleValue(filterName)
+	if (typeof filters.value[filterName] === 'undefined' || filters.value[filterName] === '') {
+		return
+	}
+	
+	// Don't load things if we already have something loaded.
+	// This is not the most ideal solution because it prevents a re-population when filters are changed 
+	// from the outside. It is still fine because we're not changing them from the outside, other than 
+	// loading them initially.
+	if(entities[kind].length > 0) {
+		return
+	}
+
+	entities[kind] = await service[servicePrefix].getAll({}, {s: filters.value[filterName]})
+}
+
+function setDoneFilter() {
+	if (filters.value.done) {
+		removeFilterProperty('done')
+	} else {
+		addFilterProperty('done', 'equals', 'false')
+	}
+	change()
+}
+
+function setFilterConcat() {
+	if (filters.value.requireAllFilters) {
+		params.value.filterConcat = 'and'
+	} else {
+		params.value.filterConcat = 'or'
+	}
+	change()
+}
+
+function setPriority() {
+	setSingleValueFilter('priority', 'priority', 'usePriority')
+}
+
+function setPercentDoneFilter() {
+	setSingleValueFilter('percentDone', 'percentDone', 'usePercentDone')
+}
+
+function clear(kind: EntityKind) {
+	foundEntities[kind] = []
+}
+
+async function find(kind: ServiceKind, query: string) {
+	if (query === '') {
+		clear(kind)
+		return
+	}
+
+	const response = await service[kind].getAll({}, {s: query})
+
+	// Filter users from the results who are already assigned
+	foundEntities[kind] = response.filter(({id}) => !includesById(entities[kind], id))
+}
+
+async function add(kind: EntityKind, filterName: FilterBy) {
+	await nextTick()
+	changeMultiselectFilter(kind, filterName)
+}
+
+async function remove(kind: EntityKind, filterName: FilterBy) {
+	await nextTick()
+	changeMultiselectFilter(kind, filterName)
+}
+
+function changeMultiselectFilter(kind: EntityKind, filterName: FilterBy) {
+	if (entities[kind].length === 0) {
+		removeFilterProperty(filterName)
+		change()
+		return
+	}
+
+	let ids: string[] = []
+	entities[kind].forEach(u => ids.push(kind === 'user' ? (u as IUser).username : String(u.id)))
+
+	filters.value[filterName] = ids.join(',')
+	setSingleValueFilter(filterName, filterName, '', 'in')
+}
+
+function changeLabelFilter() {
+	if (entities.label.length === 0) {
+		removeFilterProperty('labels')
+		change()
+		return
+	}
+
+	const labelIDs = entities.label.map(({id}) => id)
+
+	filters.value.labels = labelIDs.join(',')
+	setSingleValueFilter('labels', 'labels', '', 'in')
+}
 </script>
 
 <style lang="scss" scoped>
diff --git a/src/composables/taskList.ts b/src/composables/taskList.ts
index e23f10087..847eee143 100644
--- a/src/composables/taskList.ts
+++ b/src/composables/taskList.ts
@@ -1,52 +1,63 @@
-import {ref, shallowReactive, watch, computed} from 'vue'
+import {ref, shallowReactive, watch, computed, type Ref} from 'vue'
 import {useRoute} from 'vue-router'
 
 import TaskCollectionService from '@/services/taskCollection'
-import type { ITask } from '@/modelTypes/ITask'
+
+import type {ITask} from '@/modelTypes/ITask'
+import type {IList} from '@/modelTypes/IList'
+import type {IParams, OrderBy, SortBy} from '@/types/IParams'
 
 // FIXME: merge with DEFAULT_PARAMS in filters.vue
 export const getDefaultParams = () => ({
-	sort_by: ['position', 'id'],
-	order_by: ['asc', 'desc'],
-	filter_by: ['done'],
-	filter_value: ['false'],
-	filter_comparator: ['equals'],
-	filter_concat: 'and',
-})
+	sortBy: ['position', 'id'],
+	orderBy: ['asc', 'desc'],
+	filterBy: ['done'],
+	filterValue: ['false'],
+	filterComparator: ['equals'],
+	filterConcat: 'and',
+} as IParams)
 
-const SORT_BY_DEFAULT = {
+type FilterSortOrderMap = Partial<{[key in SortBy]: OrderBy }>
+
+const SORT_BY_DEFAULT: FilterSortOrderMap = {
 	id: 'desc',
-}
+} as const
 
 /**
  * This mixin provides a base set of methods and properties to get tasks on a list.
  */
-export function useTaskList(listId, sortByDefault = SORT_BY_DEFAULT) {
+export function useTaskList(listId: Ref<IList['id']>, sortByDefault = SORT_BY_DEFAULT) {
 	const params = ref({...getDefaultParams()})
 	
 	const search = ref('')
 	const page = ref(1)
 
-	const sortBy = ref({ ...sortByDefault })
+	const sortBy = ref<FilterSortOrderMap>({ ...sortByDefault })
 
 	// This makes sure an id sort order is always sorted last.
 	// When tasks would be sorted first by id and then by whatever else was specified, the id sort takes
 	// precedence over everything else, making any other sort columns pretty useless.
-	function formatSortOrder(params) {
-		let hasIdFilter = false
-		const sortKeys = Object.keys(sortBy.value)
-		for (const s of sortKeys) {
-			if (s === 'id') {
-				sortKeys.splice(s, 1)
-				hasIdFilter = true
-				break
+	function formatSortOrder(params: IParams) {
+		const sortEntries = Object.entries(sortBy.value)
+		const sortKeys: SortBy[] = []
+		const orderByValue: OrderBy[] = []
+		let idFilterValue
+		sortEntries.forEach(([key, value], index) => {
+			if (key === 'id') {
+				idFilterValue = value
+				sortEntries.splice(index, 1)
+				return true
 			}
-		}
-		if (hasIdFilter) {
+			sortKeys.push(key as SortBy)
+			orderByValue.push(value)
+		})
+
+		if (idFilterValue) {
 			sortKeys.push('id')
 		}
-		params.sort_by = sortKeys
-		params.order_by = sortKeys.map(s => sortBy.value[s])
+
+		params.sortBy = sortKeys
+		params.orderBy = orderByValue
 
 		return params
 	}
diff --git a/src/helpers/case.ts b/src/helpers/case.ts
index 33547c621..85b3a2739 100644
--- a/src/helpers/case.ts
+++ b/src/helpers/case.ts
@@ -1,6 +1,11 @@
 import {camelCase} from 'camel-case'
 import {snakeCase} from 'snake-case'
 
+export {
+	camelCase,
+	snakeCase,
+}
+
 /**
  * Transforms field names to camel case.
  * @param object
diff --git a/src/helpers/time/parseDateOrString.ts b/src/helpers/time/parseDateOrString.ts
index 1aeeb1153..e4bc99ba4 100644
--- a/src/helpers/time/parseDateOrString.ts
+++ b/src/helpers/time/parseDateOrString.ts
@@ -1,4 +1,4 @@
-export function parseDateOrString(rawValue: string | undefined, fallback: any): string | Date {
+export function parseDateOrString(rawValue: string | undefined, fallback: null) {
 	if (typeof rawValue === 'undefined') {
 		return fallback
 	}
diff --git a/src/helpers/utils.ts b/src/helpers/utils.ts
index e03c7f94c..fa62e7746 100644
--- a/src/helpers/utils.ts
+++ b/src/helpers/utils.ts
@@ -6,7 +6,7 @@ export function findById<T extends {id: string | number}>(array : T[], id : stri
 	return array.find(({id: currentId}) => currentId === id)
 }
 
-export function includesById(array: [], id: string | number) {
+export function includesById(array: any[], id: string | number) {
 	return array.some(({id: currentId}) => currentId === id)
 }
 
diff --git a/src/modelTypes/ISavedFilter.ts b/src/modelTypes/ISavedFilter.ts
index 5f206efa9..d4b86e6ff 100644
--- a/src/modelTypes/ISavedFilter.ts
+++ b/src/modelTypes/ISavedFilter.ts
@@ -1,12 +1,12 @@
 import type {IAbstract} from './IAbstract'
 import type {IUser} from './IUser'
-import type {IFilter} from '@/types/IFilter'
+import type {IParams} from '@/types/IParams'
 
 export interface ISavedFilter extends IAbstract {
 	id: number
 	title: string
 	description: string
-	filters: IFilter
+	filters: IParams
 
 	owner: IUser
 	created: Date
diff --git a/src/services/abstractService.ts b/src/services/abstractService.ts
index 11aede347..b79f7851a 100644
--- a/src/services/abstractService.ts
+++ b/src/services/abstractService.ts
@@ -186,7 +186,7 @@ export default abstract class AbstractService<Model extends IAbstract = IAbstrac
 	 * This one here is the default one, usually the service definitions for a model will override this.
 	 */
 	modelFactory(data : Partial<Model>) {
-		return new AbstractModel(data)
+		return data as Model
 	}
 
 	/**
diff --git a/src/types/IFilter.ts b/src/types/IFilter.ts
index aca000ab6..e4b87fa63 100644
--- a/src/types/IFilter.ts
+++ b/src/types/IFilter.ts
@@ -1,9 +1,32 @@
+import type { Priority } from '@/constants/priorities'
+
 export interface IFilter {
-	sortBy: ('done' | 'id')[]
-	orderBy: ('asc' | 'desc')[]
-	filterBy: 'done'[]
-	filterValue: 'false'[]
-	filterComparator: 'equals'[]
-	filterConcat: 'and'
-	filterIncludeNulls: boolean
-}
\ No newline at end of file
+	// where
+	listId: string
+
+	// what
+	assignees: string
+	done: boolean,
+	dueDate: string
+	endDate: string
+	labels: string
+	namespace: string
+	percentDone: number
+	priority: Priority
+	reminders: string
+	startDate: string
+
+	// filter meta
+	requireAllFilters: boolean
+
+	// toggle what
+	usePercentDone: boolean
+	usePriority: boolean
+}
+
+export interface IFilterToggles {
+	usePercentDone: boolean
+	usePriority: boolean
+}
+
+export type IFilterKey = keyof IFilter
\ No newline at end of file
diff --git a/src/types/IParams.ts b/src/types/IParams.ts
new file mode 100644
index 000000000..3cfeb7140
--- /dev/null
+++ b/src/types/IParams.ts
@@ -0,0 +1,38 @@
+import type { ITask } from '@/modelTypes/ITask'
+
+export type SortBy = 
+	| 'id'
+	| 'title'
+	| 'description'
+	| 'done'
+	| 'doneAt'
+	| 'dueDate'
+	| 'createdById'
+	| 'listId'
+	| 'repeatAfter'
+	| 'priority'
+	| 'start_date'
+	| 'end_date'
+	| 'hex_color'
+	| 'percent_done'
+	| 'uid'
+	| 'created'
+	| 'updated'
+	| 'position'
+
+export type OrderBy = 'asc' | 'desc'
+export type FilterComparator = 'equals' | 'greater' | 'greaterEquals' | 'less' | 'lessEquals' | 'like' |'in'
+
+export type FilterBy = keyof ITask | 'namespace'
+export type FilterValue = 'false' | string  | number | boolean | Date | {dateFrom: string | Date, dateTo: string | Date}
+
+export interface IParams {
+	sortBy: SortBy[]
+	orderBy: OrderBy[]
+	filterBy: FilterBy[]
+	filterValue: FilterValue[]
+	filterComparator: FilterComparator[]
+	filterConcat: 'and' | 'or'
+	filterIncludeNulls: boolean
+	s: '' // search
+}
\ No newline at end of file
diff --git a/src/views/list/ListList.vue b/src/views/list/ListList.vue
index 057563f6b..9392dffbb 100644
--- a/src/views/list/ListList.vue
+++ b/src/views/list/ListList.vue
@@ -226,7 +226,7 @@ const {
 
 
 const isAlphabeticalSorting = computed(() => {
-	return params.value.sort_by.find(sortBy => sortBy === ALPHABETICAL_SORT) !== undefined
+	return params.value.sortBy.find(sortBy => sortBy === ALPHABETICAL_SORT) !== undefined
 })
 
 const firstNewPosition = computed(() => {