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A toolkit for data mapping and language integrated query for Elixir
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integration_test/sql/subquery.exs
Code.require_file "../support/types.exs", __DIR__
defmodule Ecto.Integration.SubQueryTest do
use Ecto.Integration.Case, async: true
alias Ecto.Integration.TestRepo
import Ecto.Query
alias Ecto.Integration.Post
alias Ecto.Integration.Comment
test "from: subqueries with select source" do
TestRepo.insert!(%Post{text: "hello", public: true})
query = from p in Post, select: p
assert ["hello"] =
TestRepo.all(from p in subquery(query), select: p.text)
assert [%Post{inserted_at: %Ecto.DateTime{}}] =
TestRepo.all(from p in subquery(query), select: p)
end
test "from: subqueries with select expression" do
TestRepo.insert!(%Post{text: "hello", public: true})
query = from p in Post, select: {p.text, p.public}
assert ["hello"] =
TestRepo.all(from p in subquery(query), select: p.text)
assert [{"hello", true}] =
TestRepo.all(from p in subquery(query), select: p)
assert [{"hello", {"hello", true}}] =
TestRepo.all(from p in subquery(query), select: {p.text, p})
assert [{{"hello", true}, true}] =
TestRepo.all(from p in subquery(query), select: {p, p.public})
end
test "from: subqueries with aggregates" do
TestRepo.insert!(%Post{visits: 10})
TestRepo.insert!(%Post{visits: 11})
TestRepo.insert!(%Post{visits: 13})
query = from p in Post, select: [:visits], order_by: [asc: :visits]
assert [13] = TestRepo.all(from p in subquery(query), select: max(p.visits))
query = from p in Post, select: [:visits], order_by: [asc: :visits], limit: 2
assert [11] = TestRepo.all(from p in subquery(query), select: max(p.visits))
query = from p in Post, order_by: [asc: :visits]
assert [13] = TestRepo.all(from p in subquery(query), select: max(p.visits))
query = from p in Post, order_by: [asc: :visits], limit: 2
assert [11] = TestRepo.all(from p in subquery(query), select: max(p.visits))
end
test "from: subqueries with parameters" do
TestRepo.insert!(%Post{visits: 10, text: "hello"})
TestRepo.insert!(%Post{visits: 11, text: "hello"})
TestRepo.insert!(%Post{visits: 13, text: "world"})
query = from p in Post, where: p.visits >= ^11 and p.visits <= ^13
query = from p in subquery(query), where: p.text == ^"hello", select: fragment("? + ?", p.visits, ^1)
assert [12] = TestRepo.all(query)
end
test "join: subqueries with select source" do
%{id: id} = TestRepo.insert!(%Post{text: "hello", public: true})
TestRepo.insert!(%Comment{post_id: id})
query = from p in Post, select: p
assert ["hello"] =
TestRepo.all(from c in Comment, join: p in subquery(query), on: c.post_id == p.id, select: p.text)
assert [%Post{inserted_at: %Ecto.DateTime{}}] =
TestRepo.all(from c in Comment, join: p in subquery(query), on: c.post_id == p.id, select: p)
end
test "join: subqueries with parameters" do
TestRepo.insert!(%Post{visits: 10, text: "hello"})
TestRepo.insert!(%Post{visits: 11, text: "hello"})
TestRepo.insert!(%Post{visits: 13, text: "world"})
TestRepo.insert!(%Comment{})
TestRepo.insert!(%Comment{})
query = from p in Post, where: p.visits >= ^11 and p.visits <= ^13
query = from c in Comment,
join: p in subquery(query),
where: p.text == ^"hello",
select: fragment("? + ?", p.visits, ^1)
assert [12, 12] = TestRepo.all(query)
end
end