Module: ActiveScaffold::Bridges::FileColumn::FileColumnHelpers

Defined in:
lib/active_scaffold/bridges/file_column/file_column_helpers.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.file_column_fields(klass) ⇒ Object 



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# File 'lib/active_scaffold/bridges/file_column/file_column_helpers.rb', line 6

def file_column_fields(klass)
  klass.instance_methods.select{|m| m.to_s =~ /_just_uploaded\?$/}.collect{|m| m[0..-16].to_sym }
end

.generate_delete_helpers(klass) ⇒ Object 



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# File 'lib/active_scaffold/bridges/file_column/file_column_helpers.rb', line 10

def generate_delete_helpers(klass)
  file_column_fields(klass).each { |field|
    klass.send :class_eval, <<-EOF, __FILE__, __LINE__ + 1  unless klass.method_defined?(:"#{field}_with_delete=")
      attr_reader :delete_#{field}
      
      def delete_#{field}=(value)
        value = (value=="true") if String===value
        return unless value
        
        # passing nil to the file column causes the file to be deleted.  Don't delete if we just uploaded a file!
        self.#{field} = nil unless self.#{field}_just_uploaded?
      end
    EOF
  }
end

.klass_has_file_column_fields?(klass) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_scaffold/bridges/file_column/file_column_helpers.rb', line 26

def klass_has_file_column_fields?(klass)
  true unless file_column_fields(klass).empty?
end

Instance Method Details

#field_has_image_version?(field, version = "thumb") ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_scaffold/bridges/file_column/file_column_helpers.rb', line 39

def field_has_image_version?(field, version="thumb")
  begin
    # the only way to get to the options of a particular field is to use the instance method
    options = options_for_file_column_field(field)
    versions = options[:magick][:versions]
    raise unless versions.stringify_keys[version]
    true
  rescue
    false
  end
end

#file_column_fields ⇒ Object 



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# File 'lib/active_scaffold/bridges/file_column/file_column_helpers.rb', line 31

def file_column_fields
  @file_column_fields||=FileColumnHelpers.file_column_fields(self)
end

#generate_delete_helpers ⇒ Object 



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# File 'lib/active_scaffold/bridges/file_column/file_column_helpers.rb', line 51

def generate_delete_helpers
  FileColumnHelpers.generate_delete_helpers(self)
end

#options_for_file_column_field(field) ⇒ Object 



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# File 'lib/active_scaffold/bridges/file_column/file_column_helpers.rb', line 35

def options_for_file_column_field(field)
  self.allocate.send("#{field}_options")
end