50 lines
1.3 KiB
Ruby
50 lines
1.3 KiB
Ruby
require 'spec_helper'
|
|
|
|
describe Gitlab::SQL::RecursiveCTE, :postgresql do
|
|
let(:cte) { described_class.new(:cte_name) }
|
|
|
|
describe '#to_arel' do
|
|
it 'generates an Arel relation for the CTE body' do
|
|
rel1 = User.where(id: 1)
|
|
rel2 = User.where(id: 2)
|
|
|
|
cte << rel1
|
|
cte << rel2
|
|
|
|
sql = cte.to_arel.to_sql
|
|
name = ActiveRecord::Base.connection.quote_table_name(:cte_name)
|
|
|
|
sql1, sql2 = ActiveRecord::Base.connection.unprepared_statement do
|
|
[rel1.except(:order).to_sql, rel2.except(:order).to_sql]
|
|
end
|
|
|
|
expect(sql).to eq("#{name} AS (#{sql1}\nUNION\n#{sql2})")
|
|
end
|
|
end
|
|
|
|
describe '#alias_to' do
|
|
it 'returns an alias for the CTE' do
|
|
table = Arel::Table.new(:kittens)
|
|
|
|
source_name = ActiveRecord::Base.connection.quote_table_name(:cte_name)
|
|
alias_name = ActiveRecord::Base.connection.quote_table_name(:kittens)
|
|
|
|
expect(cte.alias_to(table).to_sql).to eq("#{source_name} AS #{alias_name}")
|
|
end
|
|
end
|
|
|
|
describe '#apply_to' do
|
|
it 'applies a CTE to an ActiveRecord::Relation' do
|
|
user = create(:user)
|
|
cte = described_class.new(:cte_name)
|
|
|
|
cte << User.where(id: user.id)
|
|
|
|
relation = cte.apply_to(User.all)
|
|
|
|
expect(relation.to_sql).to match(/WITH RECURSIVE.+cte_name/)
|
|
expect(relation.to_a).to eq(User.where(id: user.id).to_a)
|
|
end
|
|
end
|
|
end
|