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
|
# The core logic of this class is old Rails behaviour, replicated here because
# their own alias logic has evolved, but I haven't yet found a way to make use
# of it - and besides, this is only used to generate Thinking Sphinx's
# configuration rarely - not in any web requests, so performance issues are less
# critical here.
class Joiner::JoinAliaser
def self.call(join_root, alias_tracker)
new(join_root, alias_tracker).call
end
def initialize(join_root, alias_tracker)
@join_root = join_root
@alias_tracker = alias_tracker
end
def call
join_root.each_children do |parent, child|
child.table = table_aliases_for(parent, child).first
end
end
private
attr_reader :join_root, :alias_tracker
def table_aliases_for(parent, node)
node.reflection.chain.map { |reflection|
alias_tracker.aliased_table_for(
reflection.table_name,
table_alias_for(reflection, parent, reflection != node.reflection),
reflection.klass.type_caster
)
}
end
def table_alias_for(reflection, parent, join)
name = reflection.alias_candidate(parent.table_name)
join ? "#{name}_join" : name
end
end
|
