require 'helper' module Arel describe Table do before do @relation = Table.new(:users) end describe 'primary_key' do it 'should return an attribute' do @relation.primary_key.name.must_equal :id end end describe 'select_manager' do it 'should return an empty select manager' do sm = @relation.select_manager sm.to_sql.must_be_like 'SELECT' end end describe 'having' do it 'adds a having clause' do mgr = @relation.having @relation[:id].eq(10) mgr.to_sql.must_be_like %{ SELECT FROM "users" HAVING "users"."id" = 10 } end end describe 'backwards compat' do describe 'joins' do it 'returns nil' do @relation.joins(nil).must_equal nil end end describe 'join' do it 'noops on nil' do mgr = @relation.join nil mgr.to_sql.must_be_like %{ SELECT FROM "users" } end it 'takes a second argument for join type' do right = @relation.alias predicate = @relation[:id].eq(right[:id]) mgr = @relation.join(right, Nodes::OuterJoin).on(predicate) mgr.to_sql.must_be_like %{ SELECT FROM "users" LEFT OUTER JOIN "users" "users_2" ON "users"."id" = "users_2"."id" } end end end describe 'group' do it 'should create a group' do manager = @relation.group @relation[:id] manager.to_sql.must_be_like %{ SELECT FROM "users" GROUP BY "users"."id" } end end describe 'alias' do it 'should create a node that proxies to a table' do @relation.aliases.must_equal [] node = @relation.alias @relation.aliases.must_equal [node] node.name.must_equal 'users_2' node[:id].relation.must_equal node end end describe 'new' do it 'takes :columns' do columns = Table.engine.connection.columns("users") @relation = Table.new(:users, :columns => columns) @relation.columns.first.name.must_equal :id @relation.engine.must_equal Table.engine end it 'should accept an engine' do rel = Table.new :users, 'foo' rel.engine.must_equal 'foo' end it 'should accept a hash' do rel = Table.new :users, :engine => 'foo' rel.engine.must_equal 'foo' end it 'ignores as if it equals name' do rel = Table.new :users, :as => 'users' rel.table_alias.must_be_nil end end describe 'order' do it "should take an order" do manager = @relation.order "foo" manager.to_sql.must_be_like %{ SELECT FROM "users" ORDER BY foo } end end describe 'take' do it "should add a limit" do manager = @relation.take 1 manager.project SqlLiteral.new '*' manager.to_sql.must_be_like %{ SELECT * FROM "users" LIMIT 1 } end end describe 'project' do it 'can project' do manager = @relation.project SqlLiteral.new '*' manager.to_sql.must_be_like %{ SELECT * FROM "users" } end it 'takes multiple parameters' do manager = @relation.project SqlLiteral.new('*'), SqlLiteral.new('*') manager.to_sql.must_be_like %{ SELECT *, * FROM "users" } end end describe 'where' do it "returns a tree manager" do manager = @relation.where @relation[:id].eq 1 manager.project @relation[:id] manager.must_be_kind_of TreeManager manager.to_sql.must_be_like %{ SELECT "users"."id" FROM "users" WHERE "users"."id" = 1 } end end describe 'columns' do it 'returns a list of columns' do columns = @relation.columns columns.length.must_equal 2 columns.map { |x| x.name.to_s }.sort.must_equal %w{ name id }.sort end end it "should have a name" do @relation.name.must_equal :users end it "should have an engine" do @relation.engine.must_equal Table.engine end describe '[]' do describe 'when given a Symbol' do it "manufactures an attribute if the symbol names an attribute within the relation" do column = @relation[:id] column.name.must_equal :id column.must_be_kind_of Attributes::Integer end end describe 'when table does not exist' do it 'returns nil' do @relation[:foooo].must_be_nil end end end end end