diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/abstract_adapter.rb')
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract_adapter.rb | 77 |
1 files changed, 54 insertions, 23 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb index 6d3a21a3dc..d9b42d4283 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb @@ -1,5 +1,6 @@ require 'active_record/type' require 'active_support/core_ext/benchmark' +require 'active_record/connection_adapters/determine_if_preparable_visitor' require 'active_record/connection_adapters/schema_cache' require 'active_record/connection_adapters/sql_type_metadata' require 'active_record/connection_adapters/abstract/schema_dumper' @@ -22,6 +23,7 @@ module ActiveRecord autoload :TableDefinition autoload :Table autoload :AlterTable + autoload :ReferenceDefinition end autoload_at 'active_record/connection_adapters/abstract/connection_pool' do @@ -51,15 +53,15 @@ module ActiveRecord # related classes form the abstraction layer which makes this possible. # An AbstractAdapter represents a connection to a database, and provides an # abstract interface for database-specific functionality such as establishing - # a connection, escaping values, building the right SQL fragments for ':offset' - # and ':limit' options, etc. + # a connection, escaping values, building the right SQL fragments for +:offset+ + # and +:limit+ options, etc. # # All the concrete database adapters follow the interface laid down in this class. - # ActiveRecord::Base.connection returns an AbstractAdapter object, which + # {ActiveRecord::Base.connection}[rdoc-ref:ConnectionHandling#connection] returns an AbstractAdapter object, which # you can use. # # Most of the methods in the adapter are useful during migrations. Most - # notably, the instance methods provided by SchemaStatement are very useful. + # notably, the instance methods provided by SchemaStatements are very useful. class AbstractAdapter ADAPTER_NAME = 'Abstract'.freeze include Quoting, DatabaseStatements, SchemaStatements @@ -94,19 +96,32 @@ module ActiveRecord attr_reader :prepared_statements - def initialize(connection, logger = nil, pool = nil) #:nodoc: + def initialize(connection, logger = nil, config = {}) # :nodoc: super() @connection = connection @owner = nil @instrumenter = ActiveSupport::Notifications.instrumenter @logger = logger - @pool = pool + @config = config + @pool = nil @schema_cache = SchemaCache.new self @visitor = nil @prepared_statements = false end + class Version + include Comparable + + def initialize(version_string) + @version = version_string.split('.').map(&:to_i) + end + + def <=>(version_string) + @version <=> version_string.split('.').map(&:to_i) + end + end + class BindCollector < Arel::Collectors::Bind def compile(bvs, conn) casted_binds = conn.prepare_binds_for_database(bvs) @@ -201,6 +216,11 @@ module ActiveRecord false end + # Does this adapter support application-enforced advisory locking? + def supports_advisory_locks? + false + end + # Should primary key values be selected from their corresponding # sequence before the insert statement? If true, next_sequence_value # is called before each insert to set the record's primary key. @@ -254,6 +274,11 @@ module ActiveRecord false end + # Does this adapter support json data type? + def supports_json? + false + end + # This is meant to be implemented by the adapters that support extensions def disable_extension(name) end @@ -262,6 +287,20 @@ module ActiveRecord def enable_extension(name) end + # This is meant to be implemented by the adapters that support advisory + # locks + # + # Return true if we got the lock, otherwise false + def get_advisory_lock(lock_id) # :nodoc: + end + + # This is meant to be implemented by the adapters that support advisory + # locks. + # + # Return true if we released the lock, otherwise false + def release_advisory_lock(lock_id) # :nodoc: + end + # A list of extensions, to be filled in by adapters that support them. def extensions [] @@ -272,12 +311,6 @@ module ActiveRecord {} end - # Returns a bind substitution value given a bind +column+ - # NOTE: The column param is currently being used by the sqlserver-adapter - def substitute_at(column, _unused = 0) - Arel::Nodes::BindParam.new - end - # REFERENTIAL INTEGRITY ==================================== # Override to turn off referential integrity while executing <tt>&block</tt>. @@ -331,14 +364,14 @@ module ActiveRecord end # Checks whether the connection to the database is still active (i.e. not stale). - # This is done under the hood by calling <tt>active?</tt>. If the connection + # This is done under the hood by calling #active?. If the connection # is no longer active, then this method will reconnect to the database. def verify!(*ignored) reconnect! unless active? end # Provides access to the underlying database driver for this adapter. For - # example, this method returns a Mysql object in case of MysqlAdapter, + # example, this method returns a Mysql2::Client object in case of Mysql2Adapter, # and a PGconn object in case of PostgreSQLAdapter. # # This is useful for when you need to call a proprietary method such as @@ -353,19 +386,17 @@ module ActiveRecord def release_savepoint(name = nil) end - def case_sensitive_modifier(node, table_attribute) - node - end - def case_sensitive_comparison(table, attribute, column, value) - table_attr = table[attribute] - value = case_sensitive_modifier(value, table_attr) unless value.nil? - table_attr.eq(value) + if value.nil? + table[attribute].eq(value) + else + table[attribute].eq(Arel::Nodes::BindParam.new) + end end def case_insensitive_comparison(table, attribute, column, value) if can_perform_case_insensitive_comparison_for?(column) - table[attribute].lower.eq(table.lower(value)) + table[attribute].lower.eq(table.lower(Arel::Nodes::BindParam.new)) else case_sensitive_comparison(table, attribute, column, value) end @@ -501,7 +532,7 @@ module ActiveRecord def translate_exception(exception, message) # override in derived class - ActiveRecord::StatementInvalid.new(message, exception) + ActiveRecord::StatementInvalid.new(message) end def without_prepared_statement?(binds) |