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require 'spec_helper'
module Arel
class EngineProxy
attr_reader :executed
def initialize engine
@engine = engine
@executed = []
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 execute sql, name = nil
@executed << sql
end
alias :update :execute
alias :delete :execute
end
describe 'select manager' do
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.should 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.should 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
check manager.order(table[:id]).should == manager
end
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.join(right).on(predicate)
manager.to_sql.should be_like %{
SELECT FROM "users"
OUTER JOIN "users" "users_2"
ON "users"."id" = "users_2"."id"
}
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(table, aliaz, table[:id].eq(aliaz[:id]))
manager.join_sql.should be_like %{
INNER JOIN "users" "users_2" "users"."id" = "users_2"."id"
}
check manager.joins(manager).should == manager.join_sql
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(table, aliaz, table[:id].eq(aliaz[:id]))
manager.join_sql.should be_like %{
OUTER JOIN "users" "users_2" "users"."id" = "users_2"."id"
}
check manager.joins(manager).should == manager.join_sql
end
end
describe 'order_clauses' do
it 'returns order clauses as a list' do
table = Table.new :users
aliaz = table.alias
manager = Arel::SelectManager.new Table.engine
manager.from table
manager.order table[:id]
manager.order_clauses.first.should be_like %{ "users"."id" }
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
manager.delete
engine.executed.last.should 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
manager.delete
engine.executed.last.should be_like %{
DELETE FROM "users" WHERE "users"."id" = 10
}
end
end
describe 'update' do
it 'takes a string' do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.from table
manager.update(SqlLiteral.new('foo = bar'))
engine.executed.last.should 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
manager.update(table[:id] => 1)
engine.executed.last.should be_like %{
UPDATE "users" SET "id" = 1 WHERE "users"."id" = 10
}
end
it 'executes an update statement' do
engine = EngineProxy.new Table.engine
table = Table.new :users
manager = Arel::SelectManager.new engine
manager.from table
manager.update(table[:id] => 1)
engine.executed.last.should be_like %{
UPDATE "users" SET "id" = 1
}
end
end
describe 'project' do
it 'takes multiple args' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.project Nodes::SqlLiteral.new('foo'),
Nodes::SqlLiteral.new('bar')
manager.to_sql.should be_like %{ SELECT foo, bar }
end
it 'takes strings' do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.project Nodes::SqlLiteral.new('*')
manager.to_sql.should be_like %{ SELECT * }
end
it "takes sql literals" do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.project Nodes::SqlLiteral.new '*'
manager.to_sql.should be_like %{
SELECT *
}
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.should be_like %{
SELECT "users"."id"
FROM "users"
WHERE "users"."id" = 1
LIMIT 1
}
end
it "chains" do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
manager.take(1).should == manager
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.should 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).should == 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('*')
check mgr.on(predicate).should == mgr
mgr.to_sql.should 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.should be_like 'SELECT "users"."id" FROM "users"'
end
it "chains" do
table = Table.new :users
manager = Arel::SelectManager.new Table.engine
check manager.from(table).project(table['id']).should == manager
manager.to_sql.should be_like 'SELECT "users"."id" FROM "users"'
end
end
describe "TreeManager" do
subject do
table = Table.new :users
Arel::SelectManager.new(Table.engine).tap do |manager|
manager.from(table).project(table['id'])
end
end
it_should_behave_like "TreeManager"
end
end
end
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