Class: ActiveForce::Association::AbstractProjectionBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/active_force/association/eager_load_projection_builder.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(association, parent_association_field = nil, query_fields = nil) ⇒ AbstractProjectionBuilder

Returns a new instance of AbstractProjectionBuilder.



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# File 'lib/active_force/association/eager_load_projection_builder.rb', line 35

def initialize(association, parent_association_field = nil, query_fields = nil)
  @association = association
  @parent_association_field = parent_association_field
  @query_fields = query_fields
end

Instance Attribute Details

#association ⇒ Object (readonly)

Returns the value of attribute association.



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# File 'lib/active_force/association/eager_load_projection_builder.rb', line 33

def association
  @association
end

#parent_association_field ⇒ Object (readonly)

Returns the value of attribute parent_association_field.



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# File 'lib/active_force/association/eager_load_projection_builder.rb', line 33

def parent_association_field
  @parent_association_field
end

#query_fields ⇒ Object (readonly)

Returns the value of attribute query_fields.



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# File 'lib/active_force/association/eager_load_projection_builder.rb', line 33

def query_fields
  @query_fields
end

Instance Method Details

#apply_association_scope(query) ⇒ Object

Raises:



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# File 'lib/active_force/association/eager_load_projection_builder.rb', line 45

def apply_association_scope(query)
  return query unless association.scoped?
  raise InvalidEagerLoadAssociation, "Cannot use scopes that expect arguments: #{association.relation_name}" if association.scoped_as.arity.positive?

  query.instance_exec(&association.scoped_as)
end

#projections ⇒ Object 



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# File 'lib/active_force/association/eager_load_projection_builder.rb', line 41

def projections
  raise "Must define #{self.class.name}#projections"
end

#query_with_association_fields ⇒ Object

Use ActiveForce::Query to build a subquery for the SFDC relationship name. Per SFDC convention, the name needs to be pluralized



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# File 'lib/active_force/association/eager_load_projection_builder.rb', line 56

def query_with_association_fields
  relationship_name = association.sfdc_association_field
  selected_fields = query_fields || association.relation_model.fields
  query = ActiveQuery.new(association.relation_model, relationship_name).select(*selected_fields)
  apply_association_scope(query)
end