diff options
3 files changed, 35 insertions, 0 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md index 22f86fb2e1..78c0ab1cfd 100644 --- a/activerecord/CHANGELOG.md +++ b/activerecord/CHANGELOG.md @@ -1,3 +1,13 @@ +* PostgreSQL implementation of SchemaStatements#index_name_exists? + + The database agnostic implementation does not detect with indexes that are + not supported by the ActiveRecord schema dumper. For example, expressions + indexes would not be detected. + + This fixes #11018. + + *Jonathan Baudanza* + * Parsing PostgreSQL arrays with empty strings now works correctly. Previously, if you tried to parse `{"1","","2","","3"}` the result diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb index 571257f6dd..ae8ede4b42 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb @@ -126,6 +126,19 @@ module ActiveRecord SQL end + def index_name_exists?(table_name, index_name, default) + exec_query(<<-SQL, 'SCHEMA').rows.first[0].to_i > 0 + SELECT COUNT(*) + FROM pg_class t + INNER JOIN pg_index d ON t.oid = d.indrelid + INNER JOIN pg_class i ON d.indexrelid = i.oid + WHERE i.relkind = 'i' + AND i.relname = '#{index_name}' + AND t.relname = '#{table_name}' + AND i.relnamespace IN (SELECT oid FROM pg_namespace WHERE nspname = ANY (current_schemas(false)) ) + SQL + end + # Returns an array of indexes for the given table. def indexes(table_name, name = nil) result = query(<<-SQL, 'SCHEMA') diff --git a/activerecord/test/cases/adapters/postgresql/schema_test.rb b/activerecord/test/cases/adapters/postgresql/schema_test.rb index 1e59bca6a7..3f7009c1d1 100644 --- a/activerecord/test/cases/adapters/postgresql/schema_test.rb +++ b/activerecord/test/cases/adapters/postgresql/schema_test.rb @@ -246,6 +246,18 @@ class SchemaTest < ActiveRecord::TestCase assert_nothing_raised { with_schema_search_path nil } end + def test_index_name_exists + with_schema_search_path(SCHEMA_NAME) do + assert @connection.index_name_exists?(TABLE_NAME, INDEX_A_NAME, true) + assert @connection.index_name_exists?(TABLE_NAME, INDEX_B_NAME, true) + assert @connection.index_name_exists?(TABLE_NAME, INDEX_C_NAME, true) + assert @connection.index_name_exists?(TABLE_NAME, INDEX_D_NAME, true) + assert @connection.index_name_exists?(TABLE_NAME, INDEX_E_NAME, true) + assert @connection.index_name_exists?(TABLE_NAME, INDEX_E_NAME, true) + assert_not @connection.index_name_exists?(TABLE_NAME, 'missing_index', true) + end + end + def test_dump_indexes_for_schema_one do_dump_index_tests_for_schema(SCHEMA_NAME, INDEX_A_COLUMN, INDEX_B_COLUMN_S1, INDEX_D_COLUMN, INDEX_E_COLUMN) end |