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require 'helper'
module Arel
class EngineProxy
attr_reader :executed
attr_reader :connection_pool
attr_reader :spec
attr_reader :config
def initialize engine
@engine = engine
@executed = []
@connection_pool = self
@spec = self
@config = { :adapter => 'sqlite3' }
end
def with_connection
yield self
end
def connection
self
end
def quote_table_name thing; @engine.connection.quote_table_name thing end
def quote_column_name thing; @engine.connection.quote_column_name thing end
def quote thing, column; @engine.connection.quote thing, column end
def columns table, message = nil
@engine.connection.columns table, message
end
def columns_hash
@engine.connection.columns_hash
end
def table_exists? name
@engine.connection.table_exists? name
end
def tables
@engine.connection.tables
end
def visitor
@engine.connection.visitor
end
def execute sql, name = nil, *args
@executed << sql
end
alias :update :execute
alias :delete :execute
alias :insert :execute
end
describe 'select manager' do
def test_join_sources
manager = Arel::SelectManager.new Table.engine
manager.join_sources << Arel::Nodes::StringJoin.new('foo')
assert_equal "SELECT FROM 'foo'", manager.to_sql
end
describe 'backwards compatibility' do
describe 'project' do
it 'accepts symbols as sql literals' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.project :id
manager.from table
manager.to_sql.must_be_like %{
SELECT id FROM "users"
}
end
end
describe 'order' do
it 'accepts symbols' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.project SqlLiteral.new '*'
manager.from table
manager.order :foo
manager.to_sql.must_be_like %{ SELECT * FROM "users" ORDER BY foo }
end
end
describe 'group' do
it 'takes a symbol' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from table
manager.group :foo
manager.to_sql.must_be_like %{ SELECT FROM "users" GROUP BY foo }
end
end
describe 'as' do
it 'makes an AS node by grouping the AST' do
manager = Arel::SelectManager.new Table.engine
as = manager.as(Arel.sql('foo'))
assert_kind_of Arel::Nodes::Grouping, as.left
assert_equal manager.ast, as.left.expr
assert_equal 'foo', as.right
end
it 'converts right to SqlLiteral if a string' do
manager = Arel::SelectManager.new Table.engine
as = manager.as('foo')
assert_kind_of Arel::Nodes::SqlLiteral, as.right
end
it 'can make a subselect' do
manager = Arel::SelectManager.new Table.engine
manager.project Arel.star
manager.from Arel.sql('zomg')
as = manager.as(Arel.sql('foo'))
manager = Arel::SelectManager.new Table.engine
manager.project Arel.sql('name')
manager.from as
manager.to_sql.must_be_like "SELECT name FROM (SELECT * FROM zomg ) foo"
end
end
describe 'from' do
it 'ignores strings when table of same name exists' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from table
manager.from 'users'
manager.project table['id']
manager.to_sql.must_be_like 'SELECT "users"."id" FROM users'
end
it 'should support any ast' do
table = Table.new :users
manager1 = Arel::SelectManager.new Table.engine
manager2 = Arel::SelectManager.new Table.engine
manager2.project(Arel.sql('*'))
manager2.from table
manager1.project Arel.sql('lol')
as = manager2.as Arel.sql('omg')
manager1.from(as)
manager1.to_sql.must_be_like %{
SELECT lol FROM (SELECT * FROM "users" ) omg
}
end
end
describe 'having' do
it 'converts strings to SQLLiterals' do
table = Table.new :users
mgr = table.from table
mgr.having 'foo'
mgr.to_sql.must_be_like %{ SELECT FROM "users" HAVING foo }
end
it 'can have multiple items specified separately' do
table = Table.new :users
mgr = table.from table
mgr.having 'foo'
mgr.having 'bar'
mgr.to_sql.must_be_like %{ SELECT FROM "users" HAVING foo AND bar }
end
it 'can have multiple items specified together' do
table = Table.new :users
mgr = table.from table
mgr.having 'foo', 'bar'
mgr.to_sql.must_be_like %{ SELECT FROM "users" HAVING foo AND bar }
end
end
describe 'on' do
it 'converts to sqlliterals' do
table = Table.new :users
right = table.alias
mgr = table.from table
mgr.join(right).on("omg")
mgr.to_sql.must_be_like %{ SELECT FROM "users" INNER JOIN "users" "users_2" ON omg }
end
it 'converts to sqlliterals' do
table = Table.new :users
right = table.alias
mgr = table.from table
mgr.join(right).on("omg", "123")
mgr.to_sql.must_be_like %{ SELECT FROM "users" INNER JOIN "users" "users_2" ON omg AND 123 }
end
end
end
describe 'clone' do
it 'creates new cores' do
table = Table.new :users, :engine => Table.engine, :as => 'foo'
mgr = table.from table
m2 = mgr.clone
m2.project "foo"
mgr.to_sql.wont_equal m2.to_sql
end
it 'makes updates to the correct copy' do
table = Table.new :users, :engine => Table.engine, :as => 'foo'
mgr = table.from table
m2 = mgr.clone
m3 = m2.clone
m2.project "foo"
mgr.to_sql.wont_equal m2.to_sql
m3.to_sql.must_equal mgr.to_sql
end
end
describe 'initialize' do
it 'uses alias in sql' do
table = Table.new :users, :engine => Table.engine, :as => 'foo'
mgr = table.from table
mgr.skip 10
mgr.to_sql.must_be_like %{ SELECT FROM "users" "foo" OFFSET 10 }
end
end
describe 'skip' do
it 'should add an offset' do
table = Table.new :users
mgr = table.from table
mgr.skip 10
mgr.to_sql.must_be_like %{ SELECT FROM "users" OFFSET 10 }
end
it 'should chain' do
table = Table.new :users
mgr = table.from table
mgr.skip(10).to_sql.must_be_like %{ SELECT FROM "users" OFFSET 10 }
end
end
describe 'offset' do
it 'should add an offset' do
table = Table.new :users
mgr = table.from table
mgr.offset = 10
mgr.to_sql.must_be_like %{ SELECT FROM "users" OFFSET 10 }
end
it 'should remove an offset' do
table = Table.new :users
mgr = table.from table
mgr.offset = 10
mgr.to_sql.must_be_like %{ SELECT FROM "users" OFFSET 10 }
mgr.offset = nil
mgr.to_sql.must_be_like %{ SELECT FROM "users" }
end
it 'should return the offset' do
table = Table.new :users
mgr = table.from table
mgr.offset = 10
assert_equal 10, mgr.offset
end
end
describe 'exists' do
it 'should create an exists clause' do
table = Table.new(:users)
manager = Arel::SelectManager.new Table.engine, table
manager.project SqlLiteral.new '*'
m2 = Arel::SelectManager.new(manager.engine)
m2.project manager.exists
m2.to_sql.must_be_like %{ SELECT EXISTS (#{manager.to_sql}) }
end
it 'can be aliased' do
table = Table.new(:users)
manager = Arel::SelectManager.new Table.engine, table
manager.project SqlLiteral.new '*'
m2 = Arel::SelectManager.new(manager.engine)
m2.project manager.exists.as('foo')
m2.to_sql.must_be_like %{ SELECT EXISTS (#{manager.to_sql}) AS foo }
end
end
describe 'union' do
before do
table = Table.new :users
@m1 = Arel::SelectManager.new Table.engine, table
@m1.project Arel.star
@m1.where(table[:age].lt(18))
@m2 = Arel::SelectManager.new Table.engine, table
@m2.project Arel.star
@m2.where(table[:age].gt(99))
end
it 'should union two managers' do
# FIXME should this union "managers" or "statements" ?
# FIXME this probably shouldn't return a node
node = @m1.union @m2
# maybe FIXME: decide when wrapper parens are needed
node.to_sql.must_be_like %{
( SELECT * FROM "users" WHERE "users"."age" < 18 UNION SELECT * FROM "users" WHERE "users"."age" > 99 )
}
end
it 'should union all' do
node = @m1.union :all, @m2
node.to_sql.must_be_like %{
( SELECT * FROM "users" WHERE "users"."age" < 18 UNION ALL SELECT * FROM "users" WHERE "users"."age" > 99 )
}
end
end
describe 'intersect' do
before do
table = Table.new :users
@m1 = Arel::SelectManager.new Table.engine, table
@m1.project Arel.star
@m1.where(table[:age].gt(18))
@m2 = Arel::SelectManager.new Table.engine, table
@m2.project Arel.star
@m2.where(table[:age].lt(99))
end
it 'should interect two managers' do
# FIXME should this intersect "managers" or "statements" ?
# FIXME this probably shouldn't return a node
node = @m1.intersect @m2
# maybe FIXME: decide when wrapper parens are needed
node.to_sql.must_be_like %{
( SELECT * FROM "users" WHERE "users"."age" > 18 INTERSECT SELECT * FROM "users" WHERE "users"."age" < 99 )
}
end
end
describe 'except' do
before do
table = Table.new :users
@m1 = Arel::SelectManager.new Table.engine, table
@m1.project Arel.star
@m1.where(table[:age].in(18..60))
@m2 = Arel::SelectManager.new Table.engine, table
@m2.project Arel.star
@m2.where(table[:age].in(40..99))
end
it 'should except two managers' do
# FIXME should this except "managers" or "statements" ?
# FIXME this probably shouldn't return a node
node = @m1.except @m2
# maybe FIXME: decide when wrapper parens are needed
node.to_sql.must_be_like %{
( SELECT * FROM "users" WHERE "users"."age" BETWEEN 18 AND 60 EXCEPT SELECT * FROM "users" WHERE "users"."age" BETWEEN 40 AND 99 )
}
end
end
describe 'with' do
it "should support WITH RECURSIVE" do
comments = Table.new(:comments)
comments_id = comments[:id]
comments_parent_id = comments[:parent_id]
replies = Table.new(:replies)
replies_id = replies[:id]
recursive_term = Arel::SelectManager.new Table.engine
recursive_term.from(comments).project(comments_id, comments_parent_id).where(comments_id.eq 42)
non_recursive_term = Arel::SelectManager.new Table.engine
non_recursive_term.from(comments).project(comments_id, comments_parent_id).join(replies).on(comments_parent_id.eq replies_id)
union = recursive_term.union(non_recursive_term)
as_statement = Arel::Nodes::As.new replies, union
manager = Arel::SelectManager.new Table.engine
manager.with(:recursive, as_statement).from(replies).project(Arel.star)
sql = manager.to_sql
sql.must_be_like %{
WITH RECURSIVE "replies" AS (
SELECT "comments"."id", "comments"."parent_id" FROM "comments" WHERE "comments"."id" = 42
UNION
SELECT "comments"."id", "comments"."parent_id" FROM "comments" INNER JOIN "replies" ON "comments"."parent_id" = "replies"."id"
)
SELECT * FROM "replies"
}
end
end
describe 'ast' do
it 'should return the ast' do
table = Table.new :users
mgr = table.from table
ast = mgr.ast
mgr.visitor.accept(ast).must_equal mgr.to_sql
end
it 'should allow orders to work when the ast is grepped' do
table = Table.new :users
mgr = table.from table
mgr.project Arel.sql '*'
mgr.from table
mgr.orders << Arel::Nodes::Ascending.new(Arel.sql('foo'))
mgr.ast.grep(Arel::Nodes::OuterJoin)
mgr.to_sql.must_be_like %{ SELECT * FROM "users" ORDER BY foo ASC }
end
end
describe 'taken' do
it 'should return limit' do
manager = Arel::SelectManager.new Table.engine
manager.take 10
manager.taken.must_equal 10
end
end
describe 'insert' do
it 'uses the select FROM' do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.from table
manager.insert 'VALUES(NULL)'
engine.executed.last.must_be_like %{
INSERT INTO "users" VALUES(NULL)
}
end
end
describe 'lock' do
# This should fail on other databases
it 'adds a lock node' do
table = Table.new :users
mgr = table.from table
mgr.lock.to_sql.must_be_like %{ SELECT FROM "users" }
end
end
describe 'orders' do
it 'returns order clauses' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
order = table[:id]
manager.order table[:id]
manager.orders.must_equal [order]
end
end
describe 'order' do
it 'generates order clauses' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.project SqlLiteral.new '*'
manager.from table
manager.order table[:id]
manager.to_sql.must_be_like %{
SELECT * FROM "users" ORDER BY "users"."id"
}
end
# FIXME: I would like to deprecate this
it 'takes *args' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.project SqlLiteral.new '*'
manager.from table
manager.order table[:id], table[:name]
manager.to_sql.must_be_like %{
SELECT * FROM "users" ORDER BY "users"."id", "users"."name"
}
end
it 'chains' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.order(table[:id]).must_equal manager
end
it 'has order attributes' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.project SqlLiteral.new '*'
manager.from table
manager.order table[:id].desc
manager.to_sql.must_be_like %{
SELECT * FROM "users" ORDER BY "users"."id" DESC
}
end
it 'has order attributes for expressions' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.project SqlLiteral.new '*'
manager.from table
manager.order table[:id].count.desc
manager.to_sql.must_be_like %{
SELECT * FROM "users" ORDER BY COUNT("users"."id") DESC
}
end
end
describe 'on' do
it 'takes two params' do
left = Table.new :users
right = left.alias
predicate = left[:id].eq(right[:id])
manager = Arel::SelectManager.new Table.engine
manager.from left
manager.join(right).on(predicate, predicate)
manager.to_sql.must_be_like %{
SELECT FROM "users"
INNER JOIN "users" "users_2"
ON "users"."id" = "users_2"."id" AND
"users"."id" = "users_2"."id"
}
end
it 'takes three params' do
left = Table.new :users
right = left.alias
predicate = left[:id].eq(right[:id])
manager = Arel::SelectManager.new Table.engine
manager.from left
manager.join(right).on(
predicate,
predicate,
left[:name].eq(right[:name])
)
manager.to_sql.must_be_like %{
SELECT FROM "users"
INNER JOIN "users" "users_2"
ON "users"."id" = "users_2"."id" AND
"users"."id" = "users_2"."id" AND
"users"."name" = "users_2"."name"
}
end
end
it 'should hand back froms' do
relation = Arel::SelectManager.new Table.engine
assert_equal [], relation.froms
end
it 'should create and nodes' do
relation = Arel::SelectManager.new Table.engine
children = ['foo', 'bar', 'baz']
clause = relation.create_and children
assert_kind_of Arel::Nodes::And, clause
assert_equal children, clause.children
end
it 'should create insert managers' do
relation = Arel::SelectManager.new Table.engine
insert = relation.create_insert
assert_kind_of Arel::InsertManager, insert
end
it 'should create join nodes' do
relation = Arel::SelectManager.new Table.engine
join = relation.create_join 'foo', 'bar'
assert_kind_of Arel::Nodes::InnerJoin, join
assert_equal 'foo', join.left
assert_equal 'bar', join.right
end
it 'should create join nodes with a klass' do
relation = Arel::SelectManager.new Table.engine
join = relation.create_join 'foo', 'bar', Arel::Nodes::OuterJoin
assert_kind_of Arel::Nodes::OuterJoin, join
assert_equal 'foo', join.left
assert_equal 'bar', join.right
end
describe 'join' do
it 'responds to join' do
left = Table.new :users
right = left.alias
predicate = left[:id].eq(right[:id])
manager = Arel::SelectManager.new Table.engine
manager.from left
manager.join(right).on(predicate)
manager.to_sql.must_be_like %{
SELECT FROM "users"
INNER JOIN "users" "users_2"
ON "users"."id" = "users_2"."id"
}
end
it 'takes a class' do
left = Table.new :users
right = left.alias
predicate = left[:id].eq(right[:id])
manager = Arel::SelectManager.new Table.engine
manager.from left
manager.join(right, Nodes::OuterJoin).on(predicate)
manager.to_sql.must_be_like %{
SELECT FROM "users"
LEFT OUTER JOIN "users" "users_2"
ON "users"."id" = "users_2"."id"
}
end
it 'noops on nil' do
manager = Arel::SelectManager.new Table.engine
manager.join(nil).must_equal manager
end
end
describe 'joins' do
it 'returns join sql' do
table = Table.new :users
aliaz = table.alias
manager = Arel::SelectManager.new Table.engine
manager.from Nodes::InnerJoin.new(aliaz, table[:id].eq(aliaz[:id]))
manager.join_sql.must_be_like %{
INNER JOIN "users" "users_2" "users"."id" = "users_2"."id"
}
end
it 'returns outer join sql' do
table = Table.new :users
aliaz = table.alias
manager = Arel::SelectManager.new Table.engine
manager.from Nodes::OuterJoin.new(aliaz, table[:id].eq(aliaz[:id]))
manager.join_sql.must_be_like %{
LEFT OUTER JOIN "users" "users_2" "users"."id" = "users_2"."id"
}
end
it 'returns string join sql' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from Nodes::StringJoin.new('hello')
manager.join_sql.must_be_like %{ 'hello' }
end
it 'returns nil join sql' do
manager = Arel::SelectManager.new Table.engine
manager.join_sql.must_be_nil
end
end
describe 'order_clauses' do
it 'returns order clauses as a list' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from table
manager.order table[:id]
manager.order_clauses.first.must_be_like %{ "users"."id" }
end
end
describe 'group' do
it 'takes an attribute' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from table
manager.group table[:id]
manager.to_sql.must_be_like %{
SELECT FROM "users" GROUP BY "users"."id"
}
end
it 'chains' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.group(table[:id]).must_equal manager
end
it 'takes multiple args' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from table
manager.group table[:id], table[:name]
manager.to_sql.must_be_like %{
SELECT FROM "users" GROUP BY "users"."id", "users"."name"
}
end
# FIXME: backwards compat
it 'makes strings literals' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from table
manager.group 'foo'
manager.to_sql.must_be_like %{ SELECT FROM "users" GROUP BY foo }
end
end
describe 'delete' do
it "copies from" do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.from table
stmt = manager.compile_delete
stmt.to_sql.must_be_like %{ DELETE FROM "users" }
end
it "copies where" do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.from table
manager.where table[:id].eq 10
stmt = manager.compile_delete
stmt.to_sql.must_be_like %{
DELETE FROM "users" WHERE "users"."id" = 10
}
end
end
describe 'where_sql' do
it 'gives me back the where sql' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from table
manager.where table[:id].eq 10
manager.where_sql.must_be_like %{ WHERE "users"."id" = 10 }
end
it 'returns nil when there are no wheres' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from table
manager.where_sql.must_be_nil
end
end
describe 'update' do
it 'copies limits' do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.from table
manager.take 1
stmt = manager.compile_update(SqlLiteral.new('foo = bar'))
stmt.key = table['id']
stmt.to_sql.must_be_like %{
UPDATE "users" SET foo = bar
WHERE "users"."id" IN (SELECT "users"."id" FROM "users" LIMIT 1)
}
end
it 'copies order' do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.from table
manager.order :foo
stmt = manager.compile_update(SqlLiteral.new('foo = bar'))
stmt.key = table['id']
stmt.to_sql.must_be_like %{
UPDATE "users" SET foo = bar
WHERE "users"."id" IN (SELECT "users"."id" FROM "users" ORDER BY foo)
}
end
it 'takes a string' do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.from table
stmt = manager.compile_update(SqlLiteral.new('foo = bar'))
stmt.to_sql.must_be_like %{ UPDATE "users" SET foo = bar }
end
it 'copies where clauses' do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.where table[:id].eq 10
manager.from table
stmt = manager.compile_update(table[:id] => 1)
stmt.to_sql.must_be_like %{
UPDATE "users" SET "id" = 1 WHERE "users"."id" = 10
}
end
it 'copies where clauses when nesting is triggered' do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.where table[:foo].eq 10
manager.take 42
manager.from table
stmt = manager.compile_update(table[:id] => 1)
stmt.to_sql.must_be_like %{
UPDATE "users" SET "id" = 1 WHERE "users"."id" IN (SELECT "users"."id" FROM "users" WHERE "users"."foo" = 10 LIMIT 42)
}
end
it 'executes an update statement' do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.from table
stmt = manager.compile_update(table[:id] => 1)
stmt.to_sql.must_be_like %{
UPDATE "users" SET "id" = 1
}
end
end
describe 'project' do
it 'takes multiple args' do
manager = Arel::SelectManager.new Table.engine
manager.project Nodes::SqlLiteral.new('foo'),
Nodes::SqlLiteral.new('bar')
manager.to_sql.must_be_like %{ SELECT foo, bar }
end
it 'takes strings' do
manager = Arel::SelectManager.new Table.engine
manager.project Nodes::SqlLiteral.new('*')
manager.to_sql.must_be_like %{ SELECT * }
end
it "takes sql literals" do
manager = Arel::SelectManager.new Table.engine
manager.project Nodes::SqlLiteral.new '*'
manager.to_sql.must_be_like %{
SELECT *
}
end
end
describe 'projections=' do
it 'overwrites projections' do
manager = Arel::SelectManager.new Table.engine
manager.project Arel.sql('foo')
manager.projections = [Arel.sql('bar')]
manager.to_sql.must_be_like %{ SELECT bar }
end
end
describe 'take' do
it "knows take" do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from(table).project(table['id'])
manager.where(table['id'].eq(1))
manager.take 1
manager.to_sql.must_be_like %{
SELECT "users"."id"
FROM "users"
WHERE "users"."id" = 1
LIMIT 1
}
end
it "chains" do
manager = Arel::SelectManager.new Table.engine
manager.take(1).must_equal manager
end
it 'removes LIMIT when nil is passed' do
manager = Arel::SelectManager.new Table.engine
manager.limit = 10
assert_match('LIMIT', manager.to_sql)
manager.limit = nil
refute_match('LIMIT', manager.to_sql)
end
end
describe 'where' do
it "knows where" do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from(table).project(table['id'])
manager.where(table['id'].eq(1))
manager.to_sql.must_be_like %{
SELECT "users"."id"
FROM "users"
WHERE "users"."id" = 1
}
end
it "chains" do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from(table)
manager.project(table['id']).where(table['id'].eq 1).must_equal manager
end
end
describe "join" do
it "joins itself" do
left = Table.new :users
right = left.alias
predicate = left[:id].eq(right[:id])
mgr = left.join(right)
mgr.project Nodes::SqlLiteral.new('*')
mgr.on(predicate).must_equal mgr
mgr.to_sql.must_be_like %{
SELECT * FROM "users"
INNER JOIN "users" "users_2"
ON "users"."id" = "users_2"."id"
}
end
end
describe 'from' do
it "makes sql" do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from table
manager.project table['id']
manager.to_sql.must_be_like 'SELECT "users"."id" FROM "users"'
end
it "chains" do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.from(table).project(table['id']).must_equal manager
manager.to_sql.must_be_like 'SELECT "users"."id" FROM "users"'
end
end
describe 'source' do
it 'returns the join source of the select core' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.source.must_equal manager.ast.cores.last.source
end
end
end
end
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