Module: ActiveRecord::Store::ClassMethods

Defined in:
lib/active_record/store.rb

Instance Method Summary collapse

Instance Method Details

#_store_accessors_module ⇒ Object

:nodoc:



188
189
190
191
192
193
194
 
# File 'lib/active_record/store.rb', line 188

def _store_accessors_module # :nodoc:
  @_store_accessors_module ||= begin
    mod = Module.new
    include mod
    mod
  end
end

#store(store_attribute, options = {}) ⇒ Object 



104
105
106
107
 
# File 'lib/active_record/store.rb', line 104

def store(store_attribute, options = {})
  serialize store_attribute, IndifferentCoder.new(store_attribute, options[:coder])
  store_accessor(store_attribute, options[:accessors], **options.slice(:prefix, :suffix)) if options.has_key? :accessors
end

#store_accessor(store_attribute, *keys, prefix: nil, suffix: nil) ⇒ Object 



109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
 
# File 'lib/active_record/store.rb', line 109

def store_accessor(store_attribute, *keys, prefix: nil, suffix: nil)
  keys = keys.flatten

  accessor_prefix =
    case prefix
    when String, Symbol
      "#{prefix}_"
    when TrueClass
      "#{store_attribute}_"
    else
      ""
    end
  accessor_suffix =
    case suffix
    when String, Symbol
      "_#{suffix}"
    when TrueClass
      "_#{store_attribute}"
    else
      ""
    end

  _store_accessors_module.module_eval do
    keys.each do |key|
      accessor_key = "#{accessor_prefix}#{key}#{accessor_suffix}"

      define_method("#{accessor_key}=") do |value|
        write_store_attribute(store_attribute, key, value)
      end

      define_method(accessor_key) do
        read_store_attribute(store_attribute, key)
      end

      define_method("#{accessor_key}_changed?") do
        return false unless attribute_changed?(store_attribute)
        prev_store, new_store = changes[store_attribute]
        prev_store&.dig(key) != new_store&.dig(key)
      end

      define_method("#{accessor_key}_change") do
        return unless attribute_changed?(store_attribute)
        prev_store, new_store = changes[store_attribute]
        [prev_store&.dig(key), new_store&.dig(key)]
      end

      define_method("#{accessor_key}_was") do
        return unless attribute_changed?(store_attribute)
        prev_store, _new_store = changes[store_attribute]
        prev_store&.dig(key)
      end

      define_method("saved_change_to_#{accessor_key}?") do
        return false unless saved_change_to_attribute?(store_attribute)
        prev_store, new_store = saved_change_to_attribute(store_attribute)
        prev_store&.dig(key) != new_store&.dig(key)
      end

      define_method("saved_change_to_#{accessor_key}") do
        return unless saved_change_to_attribute?(store_attribute)
        prev_store, new_store = saved_change_to_attribute(store_attribute)
        [prev_store&.dig(key), new_store&.dig(key)]
      end

      define_method("#{accessor_key}_before_last_save") do
        return unless saved_change_to_attribute?(store_attribute)
        prev_store, _new_store = saved_change_to_attribute(store_attribute)
        prev_store&.dig(key)
      end
    end
  end

  # assign new store attribute and create new hash to ensure that each class in the hierarchy
  # has its own hash of stored attributes.
  self.local_stored_attributes ||= {}
  self.local_stored_attributes[store_attribute] ||= []
  self.local_stored_attributes[store_attribute] |= keys
end

#stored_attributes ⇒ Object 



196
197
198
199
200
201
202
 
# File 'lib/active_record/store.rb', line 196

def stored_attributes
  parent = superclass.respond_to?(:stored_attributes) ? superclass.stored_attributes : {}
  if local_stored_attributes
    parent.merge!(local_stored_attributes) { |k, a, b| a | b }
  end
  parent
end