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author | Ryuta Kamizono <kamipo@gmail.com> | 2015-12-15 05:26:14 +0900 |
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committer | Jeremy Daer <jeremydaer@gmail.com> | 2017-02-01 22:13:46 -0700 |
commit | 65bf1c60053e727835e06392d27a2fb49665484c (patch) | |
tree | 02a5a5b0cead003b2d24c2419585748830b4416e /activerecord/test/cases/adapters/mysql2/virtual_column_test.rb | |
parent | c98e08df7a303f4c7d6d37aa638d4ce97bb1ec9c (diff) | |
download | rails-65bf1c60053e727835e06392d27a2fb49665484c.tar.gz rails-65bf1c60053e727835e06392d27a2fb49665484c.tar.bz2 rails-65bf1c60053e727835e06392d27a2fb49665484c.zip |
Virtual/generated column support for MySQL 5.7.5+ and MariaDB 5.2.0+
MySQL generated columns: https://dev.mysql.com/doc/refman/5.7/en/create-table-generated-columns.html
MariaDB virtual columns: https://mariadb.com/kb/en/mariadb/virtual-computed-columns/
Declare virtual columns with `t.virtual name, type: …, as: "expression"`.
Pass `stored: true` to persist the generated value (false by default).
Example:
create_table :generated_columns do |t|
t.string :name
t.virtual :upper_name, type: :string, as: "UPPER(name)"
t.virtual :name_length, type: :integer, as: "LENGTH(name)", stored: true
t.index :name_length # May be indexed, too!
end
Closes #22589
Diffstat (limited to 'activerecord/test/cases/adapters/mysql2/virtual_column_test.rb')
-rw-r--r-- | activerecord/test/cases/adapters/mysql2/virtual_column_test.rb | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb b/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb new file mode 100644 index 0000000000..442a4fb7b5 --- /dev/null +++ b/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb @@ -0,0 +1,59 @@ +require "cases/helper" +require "support/schema_dumping_helper" + +if ActiveRecord::Base.connection.supports_virtual_columns? + class Mysql2VirtualColumnTest < ActiveRecord::Mysql2TestCase + include SchemaDumpingHelper + + self.use_transactional_tests = false + + class VirtualColumn < ActiveRecord::Base + end + + def setup + @connection = ActiveRecord::Base.connection + @connection.create_table :virtual_columns, force: true do |t| + t.string :name + t.virtual :upper_name, type: :string, as: "UPPER(`name`)" + t.virtual :name_length, type: :integer, as: "LENGTH(`name`)", stored: true + end + VirtualColumn.create(name: "Rails") + end + + def teardown + @connection.drop_table :virtual_columns, if_exists: true + VirtualColumn.reset_column_information + end + + def test_virtual_column + column = VirtualColumn.columns_hash["upper_name"] + assert_predicate column, :virtual? + assert_match %r{\bVIRTUAL\b}, column.extra + assert_equal "RAILS", VirtualColumn.take.upper_name + end + + def test_stored_column + column = VirtualColumn.columns_hash["name_length"] + assert_predicate column, :virtual? + assert_match %r{\b(?:STORED|PERSISTENT)\b}, column.extra + assert_equal 5, VirtualColumn.take.name_length + end + + def test_change_table + @connection.change_table :virtual_columns do |t| + t.virtual :lower_name, type: :string, as: "LOWER(name)" + end + VirtualColumn.reset_column_information + column = VirtualColumn.columns_hash["lower_name"] + assert_predicate column, :virtual? + assert_match %r{\bVIRTUAL\b}, column.extra + assert_equal "rails", VirtualColumn.take.lower_name + end + + def test_schema_dumping + output = dump_table_schema("virtual_columns") + assert_match(/t\.virtual\s+"upper_name",\s+type: :string,\s+as: "UPPER\(`name`\)"$/i, output) + assert_match(/t\.virtual\s+"name_length",\s+type: :integer,\s+as: "LENGTH\(`name`\)",\s+stored: true$/i, output) + end + end +end |