diff options
Diffstat (limited to 'activerecord/lib/active_record/base.rb')
| -rw-r--r-- | activerecord/lib/active_record/base.rb | 41 |
1 files changed, 25 insertions, 16 deletions
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb index c918e88590..9782e58299 100644 --- a/activerecord/lib/active_record/base.rb +++ b/activerecord/lib/active_record/base.rb @@ -1,5 +1,4 @@ require 'yaml' -require 'set' require 'active_support/benchmarkable' require 'active_support/dependencies' require 'active_support/descendants_tracker' @@ -171,7 +170,7 @@ module ActiveRecord #:nodoc: # <tt>Person.find_by_user_name(user_name)</tt>. # # It's possible to add an exclamation point (!) on the end of the dynamic finders to get them to raise an - # <tt>ActiveRecord::RecordNotFound</tt> error if they do not return any records, + # ActiveRecord::RecordNotFound error if they do not return any records, # like <tt>Person.find_by_last_name!</tt>. # # It's also possible to use multiple attributes in the same find by separating them with "_and_". @@ -186,7 +185,8 @@ module ActiveRecord #:nodoc: # == Saving arrays, hashes, and other non-mappable objects in text columns # # Active Record can serialize any object in text columns using YAML. To do so, you must - # specify this with a call to the class method +serialize+. + # specify this with a call to the class method + # {serialize}[rdoc-ref:AttributeMethods::Serialization::ClassMethods#serialize]. # This makes it possible to store arrays, hashes, and other non-mappable objects without doing # any additional work. # @@ -226,39 +226,47 @@ module ActiveRecord #:nodoc: # # == Connection to multiple databases in different models # - # Connections are usually created through ActiveRecord::Base.establish_connection and retrieved + # Connections are usually created through + # {ActiveRecord::Base.establish_connection}[rdoc-ref:ConnectionHandling#establish_connection] and retrieved # by ActiveRecord::Base.connection. All classes inheriting from ActiveRecord::Base will use this # connection. But you can also set a class-specific connection. For example, if Course is an # ActiveRecord::Base, but resides in a different database, you can just say <tt>Course.establish_connection</tt> # and Course and all of its subclasses will use this connection instead. # # This feature is implemented by keeping a connection pool in ActiveRecord::Base that is - # a Hash indexed by the class. If a connection is requested, the retrieve_connection method + # a hash indexed by the class. If a connection is requested, the + # {ActiveRecord::Base.retrieve_connection}[rdoc-ref:ConnectionHandling#retrieve_connection] method # will go up the class-hierarchy until a connection is found in the connection pool. # # == Exceptions # # * ActiveRecordError - Generic error class and superclass of all other errors raised by Active Record. - # * AdapterNotSpecified - The configuration hash used in <tt>establish_connection</tt> didn't include an - # <tt>:adapter</tt> key. - # * AdapterNotFound - The <tt>:adapter</tt> key used in <tt>establish_connection</tt> specified a - # non-existent adapter + # * AdapterNotSpecified - The configuration hash used in + # {ActiveRecord::Base.establish_connection}[rdoc-ref:ConnectionHandling#establish_connection] + # didn't include an <tt>:adapter</tt> key. + # * AdapterNotFound - The <tt>:adapter</tt> key used in + # {ActiveRecord::Base.establish_connection}[rdoc-ref:ConnectionHandling#establish_connection] + # specified a non-existent adapter # (or a bad spelling of an existing one). # * AssociationTypeMismatch - The object assigned to the association wasn't of the type # specified in the association definition. # * AttributeAssignmentError - An error occurred while doing a mass assignment through the - # <tt>attributes=</tt> method. + # {ActiveRecord::Base#attributes=}[rdoc-ref:AttributeAssignment#attributes=] method. # You can inspect the +attribute+ property of the exception object to determine which attribute # triggered the error. - # * ConnectionNotEstablished - No connection has been established. Use <tt>establish_connection</tt> - # before querying. + # * ConnectionNotEstablished - No connection has been established. + # Use {ActiveRecord::Base.establish_connection}[rdoc-ref:ConnectionHandling#establish_connection] before querying. # * MultiparameterAssignmentErrors - Collection of errors that occurred during a mass assignment using the - # <tt>attributes=</tt> method. The +errors+ property of this exception contains an array of + # {ActiveRecord::Base#attributes=}[rdoc-ref:AttributeAssignment#attributes=] method. + # The +errors+ property of this exception contains an array of # AttributeAssignmentError # objects that should be inspected to determine which attributes triggered the errors. - # * RecordInvalid - raised by <tt>save!</tt> and <tt>create!</tt> when the record is invalid. - # * RecordNotFound - No record responded to the +find+ method. Either the row with the given ID doesn't exist - # or the row didn't meet the additional restrictions. Some +find+ calls do not raise this exception to signal + # * RecordInvalid - raised by {ActiveRecord::Base#save}[rdoc-ref:Persistence#save] and + # {ActiveRecord::Base.create!}[rdoc-ref:Persistence::ClassMethods#create!] + # when the record is invalid. + # * RecordNotFound - No record responded to the {ActiveRecord::Base.find}[rdoc-ref:FinderMethods#find] method. + # Either the row with the given ID doesn't exist or the row didn't meet the additional restrictions. + # Some {ActiveRecord::Base.find}[rdoc-ref:FinderMethods#find] calls do not raise this exception to signal # nothing was found, please check its documentation for further details. # * SerializationTypeMismatch - The serialized object wasn't of the class specified as the second parameter. # * StatementInvalid - The database server rejected the SQL statement. The precise error is added in the message. @@ -280,6 +288,7 @@ module ActiveRecord #:nodoc: extend Explain extend Enum extend Delegation::DelegateCache + extend CollectionCacheKey include Core include Persistence |