Class: PgSearch::Configuration::Association

Inherits:
Object
  • Object
show all
Defined in:
lib/pg_search/configuration/association.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, name, column_names) ⇒ Association

Returns a new instance of Association.



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# File 'lib/pg_search/configuration/association.rb', line 10

def initialize(model, name, column_names)
  @model = model
  @name = name
  @columns = Array(column_names).map do |column_name, weight|
    ForeignColumn.new(column_name, weight, @model, self)
  end
end

Instance Attribute Details

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/pg_search/configuration/association.rb', line 8

def columns
  @columns
end

Instance Method Details

#arel_table ⇒ Object 



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# File 'lib/pg_search/configuration/association.rb', line 22

def arel_table = @model.reflect_on_association(@name).klass.arel_table

#subselect_alias ⇒ Object 



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# File 'lib/pg_search/configuration/association.rb', line 39

def subselect_alias
  Configuration.alias(table_name, @name, "subselect")
end

#table_name ⇒ Object 



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# File 'lib/pg_search/configuration/association.rb', line 18

def table_name
  @model.reflect_on_association(@name).table_name
end

#to_arel(primary_key) ⇒ Object

Builds an outer join retaining association-scope binds.

Arguments

primary_key

An Arel expression or trusted SQL String identifying the model's primary-key column, not a record's key value.

Returns a composable outer join to the search subquery.



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# File 'lib/pg_search/configuration/association.rb', line 32

def to_arel(primary_key)
  primary_key = Arel.sql(primary_key) if primary_key.is_a?(String)
  subquery = relation(primary_key).arel.as(subselect_alias)
  on_condition = Arel::Nodes::On.new(subquery[:id].eq(primary_key))
  Arel::Nodes::OuterJoin.new(subquery, on_condition)
end