Class: Ridgepole::ForeignKey

Inherits:
Object
  • Object
show all
Defined in:
lib/ridgepole/ext/foreign_key.rb

Defined Under Namespace

Modules: DSL

Class Method Summary collapse

Class Method Details

.append_add_foreign_key(table_name, foreign_key_name, attrs, buf, options) ⇒ Object 



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# File 'lib/ridgepole/ext/foreign_key.rb', line 67

def append_add_foreign_key(table_name, foreign_key_name, attrs, buf, options)
  to_table = attrs.fetch(:to_table)
  attrs_options = attrs[:options] || {}

  if options[:bulk_change]
    buf.puts("  t.foreign_key(\#{to_table.inspect}, \#{attrs_options.inspect})\n    EOS\n  else\n    buf.puts(<<-EOS)\nadd_foreign_key(\#{table_name.inspect}, \#{to_table.inspect}, \#{attrs_options.inspect})\n    EOS\n  end\nend\n")

.append_change_foreign_keys(table_name, delta, buf, options) ⇒ Object 



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# File 'lib/ridgepole/ext/foreign_key.rb', line 57

def append_change_foreign_keys(table_name, delta, buf, options)
  (delta[:delete] || {}).each do |foreign_key_name, attrs|
    append_remove_foreign_key(table_name, foreign_key_name, attrs, buf, options)
  end

  (delta[:add] || {}).each do |foreign_key_name, attrs|
    append_add_foreign_key(table_name, foreign_key_name, attrs, buf, options)
  end
end

.append_remove_foreign_key(table_name, foreign_key_name, attrs, buf, options) ⇒ Object 



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# File 'lib/ridgepole/ext/foreign_key.rb', line 82

def append_remove_foreign_key(table_name, foreign_key_name, attrs, buf, options)
  attrs_options = attrs[:options] || {}
  target = {:name => attrs_options.fetch(:name)}

  if options[:bulk_change]
    buf.puts("  t.remove_foreign_key(\#{target.inspect})\n    EOS\n  else\n    buf.puts(<<-EOS)\nremove_foreign_key(\#{table_name.inspect}, \#{target.inspect})\n    EOS\n  end\nend\n")

.check_orphan_foreign_key(definition) ⇒ Object 



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# File 'lib/ridgepole/ext/foreign_key.rb', line 13

def check_orphan_foreign_key(definition)
  definition.each do |table_name, attrs|
    if attrs[:foreign_keys] and not attrs[:definition]
      raise "Table `#{table_name}` to create the foreign key is not defined: #{attrs[:foreign_keys].keys.join(',')}"
    end
  end
end

.init ⇒ Object 



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# File 'lib/ridgepole/ext/foreign_key.rb', line 3

def init
  require 'foreigner'

  ActiveSupport.on_load :active_record do
    Foreigner.load
  end

  Ridgepole::DSLParser::Context.include_module(Ridgepole::ForeignKey::DSL)
end

.scan_foreign_keys_change(from, to, table_delta, options) ⇒ Object 



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# File 'lib/ridgepole/ext/foreign_key.rb', line 21

def scan_foreign_keys_change(from, to, table_delta, options)
  from = (from || {}).dup
  to = (to || {}).dup
  foreign_keys_delta = {}

  to.each do |foreign_key_name, to_attrs|
    from_attrs = from.delete(foreign_key_name)

    if from_attrs
      if from_attrs != to_attrs
        foreign_keys_delta[:add] ||= {}
        foreign_keys_delta[:add][foreign_key_name] = to_attrs

        unless options[:merge]
          foreign_keys_delta[:delete] ||= {}
          foreign_keys_delta[:delete][foreign_key_name] = from_attrs
        end
      end
    else
      foreign_keys_delta[:add] ||= {}
      foreign_keys_delta[:add][foreign_key_name] = to_attrs
    end
  end

  unless options[:merge]
    from.each do |foreign_key_name, from_attrs|
      foreign_keys_delta[:delete] ||= {}
      foreign_keys_delta[:delete][foreign_key_name] = from_attrs
    end
  end

  unless foreign_keys_delta.empty?
    table_delta[:foreign_keys] = foreign_keys_delta
  end
end