Module: Acts::DataTable::MultiColumnScopes

Defined in:
lib/acts_as_data_table/multi_column_scopes.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Class Method Details

.build_scope_name(*args) ⇒ Object 



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# File 'lib/acts_as_data_table/multi_column_scopes.rb', line 111

def self.build_scope_name(*args)
  args.join('_').to_sym
end

.database_cast(content) ⇒ Object

Performs a cast to text-like for various database types



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# File 'lib/acts_as_data_table/multi_column_scopes.rb', line 102

def self.database_cast(content)
  case ActiveRecord::Base.connection.adapter_name
    when 'MySQL'
      "CAST(#{content} AS CHAR(10000) CHARACTER SET utf8)"
    else
      "CAST(#{content} AS TEXT)"
  end
end

.included(base) ⇒ Object 



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# File 'lib/acts_as_data_table/multi_column_scopes.rb', line 4

def self.included(base)
  base.send :extend, ClassMethods
end

.process_column_arg(arg, includes, model = self) ⇒ Object

Processes a single argument for has_multi_column_scope. Handles

- simple values (e.g. :first_name),
- arrays which will be concatenated with a space character (e.g. [:first_name, :last_name])
- hashes which represent associations on the main model (e.g. :student => [:mat_num])



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# File 'lib/acts_as_data_table/multi_column_scopes.rb', line 76

def self.process_column_arg(arg, includes, model = self)
  if arg.is_a?(Hash)
    res = []
    arg.each do |association, columns|
      includes << association
      Array(columns).each do |column|
        res << process_column_arg(column, includes, association.to_s.singularize.classify.constantize)
      end
    end
    res
  elsif arg.is_a?(Array)
    columns = arg.map {|a| process_column_arg(a, includes, model)}
    columns = columns.map {|c| "TRIM(#{c})"}
    "CONCAT(#{columns.join(", ' ', ")})"
  else
    if model.column_names.include?(arg.to_s)
      [model.table_name, arg.to_s].join('.')
    else
      raise ArgumentError.new "The table '#{model.table_name}' does not have a column named '#{arg}'"
    end
  end
end