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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Subquery do
let_it_be(:projects) { create_list :project, 3 }
let_it_be(:project_ids) { projects.map(&:id) }
let(:relation) { Project.where(id: projects) }
subject { relation.subquery(:id) }
shared_examples 'subquery as array values' do
specify { is_expected.to match_array project_ids }
specify { expect { subject }.not_to make_queries }
end
shared_examples 'subquery as relation' do
it { is_expected.to be_a ActiveRecord::Relation }
specify { expect { subject.load }.to make_queries }
end
shared_context 'when array size exceeds max_limit' do
subject { relation.subquery(:id, max_limit: 1) }
end
context 'when relation is not loaded' do
it_behaves_like 'subquery as relation'
context 'when array size exceeds max_limit' do
include_context 'when array size exceeds max_limit'
it_behaves_like 'subquery as relation'
end
end
context 'when relation is loaded' do
before do
relation.load
end
it_behaves_like 'subquery as array values'
context 'when array size exceeds max_limit' do
include_context 'when array size exceeds max_limit'
it_behaves_like 'subquery as relation'
end
context 'with a select' do
let(:relation) { Project.where(id: projects).select(:id) }
it_behaves_like 'subquery as array values'
context 'and querying with an unloaded column' do
subject { relation.subquery(:namespace_id) }
it { expect { subject }.to raise_error(ActiveModel::MissingAttributeError) }
end
end
end
end
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