Add alias for db type in db package

pkg/db/db.go

@@ -24,6 +24,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"xorm.io/xorm/schemas"
 
 	"code.vikunja.io/api/pkg/config"
 	"code.vikunja.io/api/pkg/log"
@@ -216,3 +217,8 @@ func WipeEverything() error {
 func NewSession() *xorm.Session {
 	return x.NewSession()
 }
+
+// Type returns the db type of the currently configured db
+func Type() schemas.DBType {
+	return x.Dialect().URI().DBType
+}

pkg/models/saved_filters_test.go

@@ -67,7 +67,7 @@ func TestSavedFilter_Create(t *testing.T) {
 		"owner_id":    1,
 	}
 	// Postgres can't compare json values directly, see https://dba.stackexchange.com/a/106290/210721
-	if x.Dialect().URI().DBType == schemas.POSTGRES {
+	if db.Type() == schemas.POSTGRES {
 		vals["filters::jsonb"] = vals["filters"].(string) + "::jsonb"
 		delete(vals, "filters")
 	}

pkg/models/tasks.go

@@ -17,6 +17,7 @@
 package models
 
 import (
+	"code.vikunja.io/api/pkg/db"
 	"math"
 	"sort"
 	"strconv"
@@ -253,7 +254,7 @@ func getRawTasksForLists(s *xorm.Session, lists []*List, a web.Auth, opts *taskO
 
 		// Postgres sorts by default entries with null values after ones with values.
 		// To make that consistent with the sort order we have and other dbms, we're adding a separate clause here.
-		if x.Dialect().URI().DBType == schemas.POSTGRES {
+		if db.Type() == schemas.POSTGRES {
 			if param.orderBy == orderAscending {
 				orderby += " NULLS FIRST"
 			}