diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb')
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb | 78 |
1 files changed, 56 insertions, 22 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb index 7974ff3710..285b4065b1 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb @@ -23,6 +23,20 @@ module ActiveRecord table_name[0...table_alias_length].tr('.', '_') end + # Returns the relation names useable to back Active Record models. + # For most adapters this means all #tables and #views. + def data_sources + tables | views + end + + # Checks to see if the data source +name+ exists on the database. + # + # data_source_exists?(:ebooks) + # + def data_source_exists?(name) + data_sources.include?(name.to_s) + end + # Returns an array of table names defined in the database. def tables(name = nil) raise NotImplementedError, "#tables is not implemented" @@ -36,6 +50,19 @@ module ActiveRecord tables.include?(table_name.to_s) end + # Returns an array of view names defined in the database. + def views + raise NotImplementedError, "#views is not implemented" + end + + # Checks to see if the view +view_name+ exists on the database. + # + # view_exists?(:ebooks) + # + def view_exists?(view_name) + views.include?(view_name.to_s) + end + # Returns an array of indexes for the given table. # def indexes(table_name, name = nil) end @@ -93,6 +120,12 @@ module ActiveRecord (!options.key?(:null) || c.null == options[:null]) } end + # Returns just a table's primary key + def primary_key(table_name) + pks = primary_keys(table_name) + pks.first if pks.one? + end + # Creates a new table with the name +table_name+. +table_name+ may either # be a String or a Symbol. # @@ -158,7 +191,7 @@ module ActiveRecord # generates: # # CREATE TABLE suppliers ( - # id int(11) DEFAULT NULL auto_increment PRIMARY KEY + # id int auto_increment PRIMARY KEY # ) ENGINE=InnoDB DEFAULT CHARSET=utf8 # # ====== Rename the primary key column @@ -170,7 +203,7 @@ module ActiveRecord # generates: # # CREATE TABLE objects ( - # guid int(11) DEFAULT NULL auto_increment PRIMARY KEY, + # guid int auto_increment PRIMARY KEY, # name varchar(80) # ) # @@ -220,7 +253,11 @@ module ActiveRecord Base.get_primary_key table_name.to_s.singularize end - td.primary_key pk, options.fetch(:id, :primary_key), options + if pk.is_a?(Array) + td.primary_keys pk + else + td.primary_key pk, options.fetch(:id, :primary_key), options + end end yield td if block_given? @@ -237,10 +274,6 @@ module ActiveRecord end end - td.foreign_keys.each_pair do |other_table_name, foreign_key_options| - add_foreign_key(table_name, other_table_name, foreign_key_options) - end - result end @@ -320,7 +353,7 @@ module ActiveRecord # [<tt>:bulk</tt>] # Set this to true to make this a bulk alter query, such as # - # ALTER TABLE `users` ADD COLUMN age INT(11), ADD COLUMN birthdate DATETIME ... + # ALTER TABLE `users` ADD COLUMN age INT, ADD COLUMN birthdate DATETIME ... # # Defaults to false. # @@ -540,6 +573,8 @@ module ActiveRecord # # CREATE INDEX by_name ON accounts(name(10)) # + # ====== Creating an index with specific key lengths for multiple keys + # # add_index(:accounts, [:name, :surname], name: 'by_name_surname', length: {name: 10, surname: 15}) # # generates: @@ -769,15 +804,7 @@ module ActiveRecord def add_foreign_key(from_table, to_table, options = {}) return unless supports_foreign_keys? - options[:column] ||= foreign_key_column_for(to_table) - - options = { - column: options[:column], - primary_key: options[:primary_key], - name: foreign_key_name(from_table, options), - on_delete: options[:on_delete], - on_update: options[:on_update] - } + options = foreign_key_options(from_table, to_table, options) at = create_alter_table from_table at.add_foreign_key to_table, options @@ -845,6 +872,13 @@ module ActiveRecord "#{name.singularize}_id" end + def foreign_key_options(from_table, to_table, options) # :nodoc: + options = options.dup + options[:column] ||= foreign_key_column_for(to_table) + options[:name] ||= foreign_key_name(from_table, options) + options + end + def dump_schema_information #:nodoc: sm_table = ActiveRecord::Migrator.schema_migrations_table_name @@ -859,7 +893,7 @@ module ActiveRecord ActiveRecord::SchemaMigration.create_table end - def assume_migrated_upto_version(version, migrations_paths = ActiveRecord::Migrator.migrations_paths) + def assume_migrated_upto_version(version, migrations_paths) migrations_paths = Array(migrations_paths) version = version.to_i sm_table = quote_table_name(ActiveRecord::Migrator.schema_migrations_table_name) @@ -986,6 +1020,10 @@ module ActiveRecord [index_name, index_type, index_columns, index_options, algorithm, using] end + def options_include_default?(options) + options.include?(:default) && !(options[:null] == false && options[:default].nil?) + end + protected def add_index_sort_order(option_strings, column_names, options = {}) if options.is_a?(Hash) && order = options[:order] @@ -1012,10 +1050,6 @@ module ActiveRecord column_names.map {|name| quote_column_name(name) + option_strings[name]} end - def options_include_default?(options) - options.include?(:default) && !(options[:null] == false && options[:default].nil?) - end - def index_name_for_remove(table_name, options = {}) index_name = index_name(table_name, options) |