Merge branch 'issue_361987' into 'master'

Remove not null constraints from requirements columns

See merge request !91611

db/migrate/20220701173859_remove_not_null_constraints_from_requirements.rb

+# frozen_string_literal: true
+
+class RemoveNotNullConstraintsFromRequirements < Gitlab::Database::Migration[2.0]
+  disable_ddl_transaction!
+
+  def up
+    change_column_null :requirements, :created_at, true
+    change_column_null :requirements, :updated_at, true
+    change_column_null :requirements, :title, true
+    change_column_null :requirements, :state, true
+  end
+
+  def down
+    # No OP
+    # The columns could have nil values again at this point. Rolling back
+    # would cause an exception, also we cannot insert data and modify the schema within the same migration.
+    # More details at https://gitlab.com/gitlab-org/gitlab/-/merge_requests/91611#note_1017066470
+  end
+end

db/schema_migrations/20220701173859

+7c9b8b433553e83bb05208e62541e3d51bcc1083ff33d1146e93b92d954f9cb0
\ No newline at end of file

db/structure.sql

@@ -20270,14 +20270,14 @@ ALTER SEQUENCE required_code_owners_sections_id_seq OWNED BY required_code_owner
 CREATE TABLE requirements (
     id bigint NOT NULL,
-    created_at timestamp with time zone NOT NULL,
-    updated_at timestamp with time zone NOT NULL,
+    created_at timestamp with time zone,
+    updated_at timestamp with time zone,
     project_id integer NOT NULL,
     author_id integer,
     iid integer NOT NULL,
     cached_markdown_version integer,
-    state smallint DEFAULT 1 NOT NULL,
-    title character varying(255) NOT NULL,
+    state smallint DEFAULT 1,
+    title character varying(255),
     title_html text,
     description text,
     description_html text,