Make sure to not migrate 0 unix timestamps to 1970 iso dates

pkg/migration/20200621214452.go

@@ -65,7 +65,7 @@ create table files_dg_tmp
 	name TEXT not null,
 	mime TEXT,
 	size INTEGER not null,
-	created datetime,
+	created datetime not null,
 	created_by_id INTEGER not null
 );
 
@@ -270,7 +270,7 @@ create table task_attachments_dg_tmp
 	task_id INTEGER not null,
 	file_id INTEGER not null,
 	created_by_id INTEGER not null,
-	created datetime
+	created datetime not null
 );
 
 insert into task_attachments_dg_tmp(id, task_id, file_id, created_by_id, created) select id, task_id, file_id, created_by_id, created from task_attachments;
@@ -290,8 +290,8 @@ create table task_comments_dg_tmp
 	comment TEXT not null,
 	author_id INTEGER not null,
 	task_id INTEGER not null,
-	created datetime,
-	updated datetime
+	created datetime not null,
+	updated datetime not null
 );
 
 insert into task_comments_dg_tmp(id, comment, author_id, task_id, created, updated) select id, comment, author_id, task_id, created, updated from task_comments;
@@ -500,8 +500,8 @@ create table teams_dg_tmp
 	name TEXT not null,
 	description TEXT,
 	created_by_id INTEGER not null,
-	created datetime,
-	updated datetime
+	created datetime not null,
+	updated datetime not null
 );
 
 insert into teams_dg_tmp(id, name, description, created_by_id, created, updated) select id, name, description, created_by_id, created, updated from teams;
@@ -656,10 +656,16 @@ create unique index UQE_users_namespace_id
 					}
 				case schemas.SQLITE:
 					// welp
-					// sqlite will need a long string with all table modifications
-					// But at least we can do the conversion of data with it
-					sql = []string{
-						"UPDATE " + table + " SET " + colFinal + " = DATETIME(" + colFinal + ", 'unixepoch', 'localtime')",
+					// All created and updated columns are set to not null
+					// But some of the test data is 0 so we can't use our update script on it.
+					if column != "updated" && column != "created" {
+						sql = []string{
+							"UPDATE " + table + " SET " + colFinal + " = CASE WHEN " + colFinal + " > 0 THEN DATETIME(" + colFinal + ", 'unixepoch', 'localtime') ELSE NULL END",
+						}
+					} else {
+						sql = []string{
+							"UPDATE " + table + " SET " + colFinal + " = DATETIME(" + colFinal + ", 'unixepoch', 'localtime')",
+						}
 					}
 				default:
 					return fmt.Errorf("unsupported dbms: %s", tx.Dialect().URI().DBType)