Class: ParamsReady::Query::Join

Inherits:
Object
  • Object
show all
Defined in:
lib/params_ready/query/join_clause.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(table, type, &block) ⇒ Join

Returns a new instance of Join.



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# File 'lib/params_ready/query/join_clause.rb', line 8

def initialize(table, type, &block)
  @arel_table = table
  @type = arel_type(type)
  @statement = JoinStatement.new(&block)
end

Instance Attribute Details

#arel_table ⇒ Object (readonly)

Returns the value of attribute arel_table.



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# File 'lib/params_ready/query/join_clause.rb', line 6

def arel_table
  @arel_table
end

#statement ⇒ Object (readonly)

Returns the value of attribute statement.



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# File 'lib/params_ready/query/join_clause.rb', line 6

def statement
  @statement
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/params_ready/query/join_clause.rb', line 6

def type
  @type
end

Instance Method Details

#arel_type(type) ⇒ Object 



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# File 'lib/params_ready/query/join_clause.rb', line 14

def arel_type(type)
  case type
  when :inner then Arel::Nodes::InnerJoin
  when :outer then Arel::Nodes::OuterJoin
  else raise ParamsReadyError, "Unimplemented join type '#{type}'"
  end
end

#to_arel(base_table, context, parameter) ⇒ Object 



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# File 'lib/params_ready/query/join_clause.rb', line 22

def to_arel(base_table, context, parameter)
  join_statement = @statement.to_arel(base_table, @arel_table, context, parameter)
  base_table.join(@arel_table, @type).on(join_statement)
end