UbiquoVersions::Adapters::SchemaStatements

Extends the create_table method to support the :versionable option

Public Class Methods

apply_versionable_option!(method, adapter, table_name, options = {}) {|table| ...} click to toggle source

Performs the actual job of applying the :translatable option

    # File vendor/plugins/ubiquo_versions/lib/ubiquo_versions/adapters/schema_statements.rb, line 37
37:       def self.apply_versionable_option!(method, adapter, table_name, options = {})
38:         versionable = options.delete(:versionable)
39:         method_name = "#{method}_without_versions"
40: 
41:         # not all methods accept the options hash
42:         args = [table_name]
43:         args << options if adapter.method(method_name).arity != 1
44:         
45:         adapter.send(method_name, *args) do |table|
46:           if versionable
47:             table.sequence table_name, :version_number
48:             table.sequence table_name, :content_id
49:             table.boolean :is_current_version, :null => false, :default => false
50:             table.integer :parent_version
51:           elsif versionable == false && method == :change_table
52:             table.remove :is_current_version, :parent_version
53:             table.remove_sequence :test, :version_number
54:             table.remove_sequence :test, :content_id
55:           end
56:           yield table
57:         end
58: 
59:         # create or remove indexes for these new fields
60:         indexes = [:is_current_version, :parent_version, :content_id]
61:         if versionable
62:           indexes.each do |index|
63:             unless adapter.indexes(table_name).map(&:columns).flatten.include? index.to_s
64:               adapter.add_index table_name, index
65:             end
66:           end
67:         elsif versionable == false
68:           indexes.each do |index|
69:             if adapter.indexes(table_name).map(&:columns).flatten.include? index.to_s
70:               adapter.remove_index table_name, index
71:             end
72:           end
73:         end
74: 
75:       end

included(klass) click to toggle source

Perform the actual linking with create_table

    # File vendor/plugins/ubiquo_versions/lib/ubiquo_versions/adapters/schema_statements.rb, line 7
 7:       def self.included(klass)
 8:         klass.send(:alias_method_chain, :create_table, :versions)
 9:         klass.send(:alias_method_chain, :change_table, :versions)
10:       end

Public Instance Methods

change_table_with_versions(*args, &block) click to toggle source

Parse the :versionable option as a create_table extension

This will actually add four fields:

  table.version_number : sequence
  table.content_id : sequence
  table.is_current_version : boolean
  table.parent_version : integer

with their respective indexes (except for version_number)

    # File vendor/plugins/ubiquo_versions/lib/ubiquo_versions/adapters/schema_statements.rb, line 32
32:       def change_table_with_versions(*args, &block)
33:         SchemaStatements.apply_versionable_option!(:change_table, self, *args, &block)
34:       end

create_table_with_versions(*args, &block) click to toggle source

Parse the :versionable option as a create_table extension

This will actually add four fields:

  table.version_number : sequence
  table.content_id : sequence
  table.is_current_version : boolean
  table.parent_version : integer

with their respective indexes (except for version_number)

    # File vendor/plugins/ubiquo_versions/lib/ubiquo_versions/adapters/schema_statements.rb, line 20
20:       def create_table_with_versions(*args, &block)
21:         SchemaStatements.apply_versionable_option!(:create_table, self, *args, &block)
22:       end

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UbiquoVersions::Adapters::SchemaStatements

Public Class Methods

Public Instance Methods