1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
# frozen_string_literal: true
module ActiveRecord
class TableMetadata # :nodoc:
delegate :join_primary_key, :join_primary_type, :join_foreign_key, :join_foreign_type, to: :reflection
def initialize(klass, arel_table, reflection = nil)
@klass = klass
@arel_table = arel_table
@reflection = reflection
end
def primary_key
klass&.primary_key
end
def type(column_name)
arel_table.type_for_attribute(column_name)
end
def has_column?(column_name)
klass&.columns_hash&.key?(column_name)
end
def associated_with?(table_name)
klass&._reflect_on_association(table_name)
end
def associated_table(table_name)
reflection = klass._reflect_on_association(table_name) || klass._reflect_on_association(table_name.singularize)
if !reflection && table_name == arel_table.name
return self
end
if reflection
association_klass = reflection.klass unless reflection.polymorphic?
elsif block_given?
association_klass = yield table_name
end
if association_klass
arel_table = association_klass.arel_table
arel_table = arel_table.alias(table_name) if arel_table.name != table_name
TableMetadata.new(association_klass, arel_table, reflection)
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, reflection)
end
end
def polymorphic_association?
reflection&.polymorphic?
end
def polymorphic_name_association
reflection&.polymorphic_name
end
def through_association?
reflection&.through_reflection?
end
def reflect_on_aggregation(aggregation_name)
klass&.reflect_on_aggregation(aggregation_name)
end
alias :aggregated_with? :reflect_on_aggregation
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
attr_reader :arel_table
private
attr_reader :klass, :reflection
end
end
|
