How to define trigger conditions within a ActiveRecord object?

How to define trigger conditions within a ActiveRecord object?



1.ruby on rails - How to define trigger conditions within a ...

Description:How to define trigger conditions within a ActiveRecord ... Is
there a way to validate a specific attribute on an ActiveRecord without
instantiating an object first?



2.ActiveRecord::Base - Ruby on Rails

Description:... Base < Object. activerecord /lib/active_record/base.rb;
Active Record. Active Record objects don't ... Conditions. Conditions can
... to determine which ...



3.Active Record Query Interface — Ruby on Rails Guides

Description:Instantiate the equivalent Ruby object of the ...
Model.find_by! finds the first record matching some conditions. It raises
ActiveRecord:: ... To define a simple ...



4.Active Record Callbacks — Ruby on Rails Guides

Description:class User < ActiveRecord ... The after_initialize callback is
triggered every time a new object of ... if option when you want to
specify under which conditions the ...



5.What is triggering? - IBM

Description:The queue manager defines certain conditions as constituting
trigger ... definition object ... within the associated process definition
object is ...



6.Active Record Validations — Ruby on Rails Guides

Description:class Person < ActiveRecord ... The following methods trigger
validations, and will save the object to the ... when multiple conditions
define whether or ...



7.SQL Statements: CREATE SYNONYM to CREATE TRIGGER, 6 of 6

Description:You cannot specify a BEFORE trigger on a view or an object
view. ... Specify SCHEMA to define the trigger on the current schema. ...
Restrictions on Trigger Conditions.



8.CREATE TRIGGER - Oracle Documentation

Description:The ON clause lets you determine the database object on which
the trigger ... Restrictions on Trigger Conditions. ... if the block is
executed within the same ...



9.Triggers - Oracle Software Downloads | Oracle Technology ...

Description:... a SQL statement within its trigger action potentially ...
When you define a trigger, ... An INSTEAD OF trigger can be used on object
views as well as relational ...



10.CREATE TRIGGER

Description:Any combination of these in any order is allowed in the
trigger definition. ... Trigger conditions specify additional ...
associated with the object ...