Entity field with array: true and length generates a new migration every time

[realyze]

Issue type:

[ ] question
[x ] bug report
[ ] feature request
[ ] documentation issue

Database system/driver:

[ ] cordova
[ ] mongodb
[ ] mssql
[ ] mysql / mariadb
[ ] oracle
[x] postgres
[ ] sqlite
[ ] sqljs
[ ] react-native
[ ] expo

TypeORM version:

[x] latest
[x] @next
[ ] 0.x.x (or put your version here)

Steps to reproduce or a small repository showing the problem:
When I add an entity field with array: true and length: <n>, migration:generate will drop and re-add the array column every time.

Small reproducible case here: https://github.com/realyze/typescript-example (problematic fields added here: https://github.com/realyze/typescript-example/blob/master/src/entity/Post.ts#L20-L27)

Big props to you for this awesome ORM, @pleerock !

[iCrawl]

Looks similar to #3076 where certain default values have the same issue. Maybe this goes a bit deeper.

[xiaoweiColive]

Similar issue here. When I have array set to true and a length, every time I reboot the app, the data of that field will be cleared without being stored.

[AlexMesser]

I just checked this reproduction on the latest 0.2.36, everything works as expected:

% typeorm migration:run
query: SELECT * FROM current_schema()
query: SELECT * FROM "information_schema"."tables" WHERE "table_schema" = 'public' AND "table_name" = 'migrations'
query: SELECT * FROM "migrations" "migrations" ORDER BY "id" DESC
0 migrations are already loaded in the database.
1 migrations were found in the source code.
1 migrations are new migrations that needs to be executed.
query: START TRANSACTION
query: ALTER TABLE "public"."post" ADD "myLittleBrokenArray" character varying(25) array
query: INSERT INTO "migrations"("timestamp", "name") VALUES ($1, $2) -- PARAMETERS: [1627731077991,"aaa1627731077991"]
Migration aaa1627731077991 has been executed successfully.
query: COMMIT
% typeorm migration:run
query: SELECT * FROM current_schema()
query: SELECT * FROM "information_schema"."tables" WHERE "table_schema" = 'public' AND "table_name" = 'migrations'
query: SELECT * FROM "migrations" "migrations" ORDER BY "id" DESC
No migrations are pending

Closing because this issue most probably isn't actual anymore.