Delegate limit to subtype

As described here https://github.com/rails/rails/issues/19420. When
using the Postgres BigInt[] field type the big int value was not being
translated into schema.rb. This caused the field to become just a
regular integer field when building off of schema.rb. This fix will
address this by delegating the limit from the subtype to the Array type.

https://github.com/rails/rails/issues/19420

2 files changed, 9 insertions, 0 deletions

diff --git a/activerecord/test/cases/schema_dumper_test.rb b/activerecord/test/cases/schema_dumper_test.rb
index 6bf4df70eb..6c099719c0 100644
--- a/activerecord/test/cases/schema_dumper_test.rb
+++ b/activerecord/test/cases/schema_dumper_test.rb
@@ -248,6 +248,11 @@ class SchemaDumperTest < ActiveRecord::TestCase
       assert_match %r{t\.integer\s+"bigint_default",\s+limit: 8,\s+default: 0}, output
     end
 
+    def test_schema_dump_includes_limit_on_array_type
+      output = standard_dump
+      assert_match %r{t\.integer\s+"big_int_data_points\",\s+limit: 8,\s+array: true}, output
+    end
+
     if ActiveRecord::Base.connection.supports_extensions?
       def test_schema_dump_includes_extensions
         connection = ActiveRecord::Base.connection
diff --git a/activerecord/test/schema/postgresql_specific_schema.rb b/activerecord/test/schema/postgresql_specific_schema.rb
index f84be0e7f4..008503bc24 100644
--- a/activerecord/test/schema/postgresql_specific_schema.rb
+++ b/activerecord/test/schema/postgresql_specific_schema.rb
@@ -93,4 +93,8 @@ _SQL
     t.binary :binary, limit: 100_000
     t.text :text, limit: 100_000
   end
+
+  create_table :bigint_array, force: true do |t|
+    t.integer :big_int_data_points, limit: 8, array: true
+  end
 end