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# frozen_string_literal: true
module ActiveRecord
class TableMetadata # :nodoc:
delegate :foreign_type, :foreign_key, :join_primary_key, :join_foreign_key, to: :association, prefix: true
def initialize(klass, arel_table, association = nil, types = klass)
@klass = klass
@types = types
@arel_table = arel_table
@association = association
end
def resolve_column_aliases(hash)
new_hash = hash.dup
hash.each_key do |key|
if key.is_a?(Symbol) && new_key = klass.attribute_aliases[key.to_s]
new_hash[new_key] = new_hash.delete(key)
end
end
new_hash
end
def arel_attribute(column_name)
if klass
klass.arel_attribute(column_name, arel_table)
else
arel_table[column_name]
end
end
def type(column_name)
types.type_for_attribute(column_name)
end
def has_column?(column_name)
klass && klass.columns_hash.key?(column_name.to_s)
end
def associated_with?(association_name)
klass && klass._reflect_on_association(association_name)
end
def associated_table(table_name)
association = klass._reflect_on_association(table_name) || klass._reflect_on_association(table_name.to_s.singularize)
if !association && table_name == arel_table.name
self
elsif association && !association.polymorphic?
association_klass = association.klass
arel_table = association_klass.arel_table.alias(table_name)
TableMetadata.new(association_klass, arel_table, association)
else
type_caster = TypeCaster::Connection.new(klass, table_name)
arel_table = Arel::Table.new(table_name, type_caster: type_caster)
TableMetadata.new(nil, arel_table, association, type_caster)
end
end
def associated_predicate_builder(table_name)
associated_table(table_name).predicate_builder
end
def polymorphic_association?
association && association.polymorphic?
end
def aggregated_with?(aggregation_name)
klass && reflect_on_aggregation(aggregation_name)
end
def reflect_on_aggregation(aggregation_name)
klass.reflect_on_aggregation(aggregation_name)
end
protected
def predicate_builder
if klass
predicate_builder = klass.predicate_builder.dup
predicate_builder.instance_variable_set(:@table, self)
predicate_builder
else
PredicateBuilder.new(self)
end
end
private
attr_reader :klass, :types, :arel_table, :association
end
end
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