diff options
Diffstat (limited to 'activerecord/lib')
| -rwxr-xr-x | activerecord/lib/active_record/base.rb | 71 |
1 files changed, 70 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb index e763eb381c..c2ecd0121e 100755 --- a/activerecord/lib/active_record/base.rb +++ b/activerecord/lib/active_record/base.rb @@ -525,6 +525,75 @@ module ActiveRecord #:nodoc: "type" end + # Defines an "attribute" method (like #inheritance_column or + # #table_name). A new (class) method will be created with the + # given name. If a value is specified, the new method will + # return that value (as a string). Otherwise, the given block + # will be used to compute the value of the method. + # + # The original method will be aliased, with the new name being + # prefixed with "original_". This allows the new method to + # access the original value. + # + # Example: + # + # class A < ActiveRecord::Base + # define_attr_method :primary_key, "sysid" + # define_attr_method( :inheritance_column ) do + # original_inheritance_column + "_id" + # end + # end + def define_attr_method( name, value=nil, &block ) + sing = class << self; self; end + block = proc { value.to_s } if value + sing.send( :alias_method, "original_#{name}", name ) + sing.send( :define_method, name, &block ) + end + + # Sets the table name to use to the given value, or (if the value + # is nil or false) to the value returned by the given block. (See + # #define_attr_method). + # + # Example: + # + # class Project < ActiveRecord::Base + # set_table_name "project" + # end + def set_table_name( value=nil, &block ) + define_attr_method :table_name, value, &block + end + alias :table_name= :set_table_name + + # Sets the name of the primary key column to use to the given value, + # or (if the value is nil or false) to the value returned by the given + # block. (See #define_attr_method). + # + # Example: + # + # class Project < ActiveRecord::Base + # set_primary_key "sysid" + # end + def set_primary_key( value=nil, &block ) + define_attr_method :primary_key, value, &block + end + alias :primary_key= :set_primary_key + + # Sets the name of the inheritance column to use to the given value, + # or (if the value # is nil or false) to the value returned by the + # given block. (See # #define_attr_method). + # + # Example: + # + # class Project < ActiveRecord::Base + # set_inheritance_column do + # original_inheritance_column + "_id" + # end + # end + def set_inheritance_column( value=nil, &block ) + define_attr_method :inheritance_column, value, &block + end + alias :inheritance_column= :set_inheritance_column + # Turns the +table_name+ back into a class name following the reverse rules of +table_name+. def class_name(table_name = table_name) # :nodoc: # remove any prefix and/or suffix from the table name @@ -1253,4 +1322,4 @@ module ActiveRecord #:nodoc: string[0..3] == "--- " end end -end
\ No newline at end of file +end |