require 'helper'
module Arel
module Visitors
describe 'the to_sql visitor' do
before do
@visitor = ToSql.new Table.engine.connection
@table = Table.new(:users)
@attr = @table[:id]
end
it 'works with BindParams' do
node = Nodes::BindParam.new 'omg'
sql = @visitor.accept node
sql.must_be_like 'omg'
end
it 'can define a dispatch method' do
visited = false
viz = Class.new(Arel::Visitors::Visitor) {
define_method(:hello) do |node|
visited = true
end
def dispatch
{ Arel::Table => 'hello' }
end
}.new
viz.accept(@table)
assert visited, 'hello method was called'
end
it 'should not quote sql literals' do
node = @table[Arel.star]
sql = @visitor.accept node
sql.must_be_like '"users".*'
end
it 'should visit named functions' do
function = Nodes::NamedFunction.new('omg', [Arel.star])
assert_equal 'omg(*)', @visitor.accept(function)
end
it 'should chain predications on named functions' do
function = Nodes::NamedFunction.new('omg', [Arel.star])
sql = @visitor.accept(function.eq(2))
sql.must_be_like %{ omg(*) = 2 }
end
it 'should visit built-in functions' do
function = Nodes::Count.new([Arel.star])
assert_equal 'COUNT(*)', @visitor.accept(function)
function = Nodes::Sum.new([Arel.star])
assert_equal 'SUM(*)', @visitor.accept(function)
function = Nodes::Max.new([Arel.star])
assert_equal 'MAX(*)', @visitor.accept(function)
function = Nodes::Min.new([Arel.star])
assert_equal 'MIN(*)', @visitor.accept(function)
function = Nodes::Avg.new([Arel.star])
assert_equal 'AVG(*)', @visitor.accept(function)
end
it 'should visit built-in functions operating on distinct values' do
function = Nodes::Count.new([Arel.star])
function.distinct = true
assert_equal 'COUNT(DISTINCT *)', @visitor.accept(function)
function = Nodes::Sum.new([Arel.star])
function.distinct = true
assert_equal 'SUM(DISTINCT *)', @visitor.accept(function)
function = Nodes::Max.new([Arel.star])
function.distinct = true
assert_equal 'MAX(DISTINCT *)', @visitor.accept(function)
function = Nodes::Min.new([Arel.star])
function.distinct = true
assert_equal 'MIN(DISTINCT *)', @visitor.accept(function)
function = Nodes::Avg.new([Arel.star])
function.distinct = true
assert_equal 'AVG(DISTINCT *)', @visitor.accept(function)
end
it 'works with lists' do
function = Nodes::NamedFunction.new('omg', [Arel.star, Arel.star])
assert_equal 'omg(*, *)', @visitor.accept(function)
end
describe 'equality' do
it 'should handle false' do
sql = @visitor.accept Nodes::Equality.new(false, false)
sql.must_be_like %{ 'f' = 'f' }
end
it 'should use the column to quote' do
table = Table.new(:users)
sql = @visitor.accept Nodes::Equality.new(table[:id], '1-fooo')
sql.must_be_like %{ "users"."id" = 1 }
end
end
it "should visit string subclass" do
@visitor.accept(Class.new(String).new(":'("))
@visitor.accept(Class.new(Class.new(String)).new(":'("))
end
it "should visit_Class" do
@visitor.accept(DateTime).must_equal "'DateTime'"
end
it "should escape LIMIT" do
sc = Arel::Nodes::SelectStatement.new
sc.limit = Arel::Nodes::Limit.new("omg")
assert_match(/LIMIT 'omg'/, @visitor.accept(sc))
end
it "should visit_DateTime" do
@visitor.accept DateTime.now
end
it "should visit_Float" do
@visitor.accept 2.14
end
it "should visit_Not" do
sql = @visitor.accept Nodes::Not.new(Arel.sql("foo"))
sql.must_be_like "NOT (foo)"
end
it "should apply Not to the whole expression" do
node = Nodes::And.new [@attr.eq(10), @attr.eq(11)]
sql = @visitor.accept Nodes::Not.new(node)
sql.must_be_like %{NOT ("users"."id" = 10 AND "users"."id" = 11)}
end
it "should visit_As" do
as = Nodes::As.new(Arel.sql("foo"), Arel.sql("bar"))
sql = @visitor.accept as
sql.must_be_like "foo AS bar"
end
it "should visit_Bignum" do
@visitor.accept 8787878092
end
it "should visit_Hash" do
@visitor.accept({:a => 1})
end
it "should visit_BigDecimal" do
@visitor.accept BigDecimal.new('2.14')
end
it "should visit_Date" do
@visitor.accept Date.today
end
it "should visit_NilClass" do
@visitor.accept(nil).must_be_like "NULL"
end
it "should visit_Arel_SelectManager, which is a subquery" do
mgr = Table.new(:foo).project(:bar)
@visitor.accept(mgr).must_be_like '(SELECT bar FROM "foo")'
end
it "should visit_Arel_Nodes_And" do
node = Nodes::And.new [@attr.eq(10), @attr.eq(11)]
@visitor.accept(node).must_be_like %{
"users"."id" = 10 AND "users"."id" = 11
}
end
it "should visit_Arel_Nodes_Or" do
node = Nodes::Or.new @attr.eq(10), @attr.eq(11)
@visitor.accept(node).must_be_like %{
"users"."id" = 10 OR "users"."id" = 11
}
end
it "should visit visit_Arel_Attributes_Time" do
attr = Attributes::Time.new(@attr.relation, @attr.name)
@visitor.accept attr
end
it "should visit_TrueClass" do
test = Table.new(:users)[:bool].eq(true)
@visitor.accept(test).must_be_like %{ "users"."bool" = 't' }
end
describe "Nodes::Ordering" do
it "should know how to visit" do
node = @attr.desc
@visitor.accept(node).must_be_like %{
"users"."id" DESC
}
end
end
describe "Nodes::In" do
it "should know how to visit" do
node = @attr.in [1, 2, 3]
@visitor.accept(node).must_be_like %{
"users"."id" IN (1, 2, 3)
}
end
it "should return 1=0 when empty right which is always false" do
node = @attr.in []
@visitor.accept(node).must_equal '1=0'
end
it 'can handle two dot ranges' do
node = @attr.in 1..3
@visitor.accept(node).must_be_like %{
"users"."id" BETWEEN 1 AND 3
}
end
it 'can handle three dot ranges' do
node = @attr.in 1...3
@visitor.accept(node).must_be_like %{
"users"."id" >= 1 AND "users"."id" < 3
}
end
it 'can handle ranges bounded by infinity' do
node = @attr.in 1..Float::INFINITY
@visitor.accept(node).must_be_like %{
"users"."id" >= 1
}
node = @attr.in(-Float::INFINITY..3)
@visitor.accept(node).must_be_like %{
"users"."id" <= 3
}
node = @attr.in(-Float::INFINITY...3)
@visitor.accept(node).must_be_like %{
"users"."id" < 3
}
node = @attr.in(-Float::INFINITY..Float::INFINITY)
@visitor.accept(node).must_be_like %{1=1}
end
it 'can handle subqueries' do
table = Table.new(:users)
subquery = table.project(:id).where(table[:name].eq('Aaron'))
node = @attr.in subquery
@visitor.accept(node).must_be_like %{
"users"."id" IN (SELECT id FROM "users" WHERE "users"."name" = 'Aaron')
}
end
it 'uses the same column for escaping values' do
@attr = Table.new(:users)[:name]
visitor = Class.new(ToSql) do
attr_accessor :expected
def quote value, column = nil
raise unless column == expected
super
end
end
in_node = Nodes::In.new @attr, %w{ a b c }
visitor = visitor.new(Table.engine.connection)
visitor.expected = Table.engine.connection.columns(:users).find { |x|
x.name == 'name'
}
visitor.accept(in_node).must_equal %("users"."name" IN ('a', 'b', 'c'))
end
end
describe "Nodes::InfixOperation" do
it "should handle Multiplication" do
node = Arel::Attributes::Decimal.new(Table.new(:products), :price) * Arel::Attributes::Decimal.new(Table.new(:currency_rates), :rate)
@visitor.accept(node).must_equal %("products"."price" * "currency_rates"."rate")
end
it "should handle Division" do
node = Arel::Attributes::Decimal.new(Table.new(:products), :price) / 5
@visitor.accept(node).must_equal %("products"."price" / 5)
end
it "should handle Addition" do
node = Arel::Attributes::Decimal.new(Table.new(:products), :price) + 6
@visitor.accept(node).must_equal %(("products"."price" + 6))
end
it "should handle Subtraction" do
node = Arel::Attributes::Decimal.new(Table.new(:products), :price) - 7
@visitor.accept(node).must_equal %(("products"."price" - 7))
end
it "should handle arbitrary operators" do
node = Arel::Nodes::InfixOperation.new(
'||',
Arel::Attributes::String.new(Table.new(:products), :name),
Arel::Attributes::String.new(Table.new(:products), :name)
)
@visitor.accept(node).must_equal %("products"."name" || "products"."name")
end
end
describe "Nodes::NotIn" do
it "should know how to visit" do
node = @attr.not_in [1, 2, 3]
@visitor.accept(node).must_be_like %{
"users"."id" NOT IN (1, 2, 3)
}
end
it "should return 1=1 when empty right which is always true" do
node = @attr.not_in []
@visitor.accept(node).must_equal '1=1'
end
it 'can handle two dot ranges' do
node = @attr.not_in 1..3
@visitor.accept(node).must_be_like %{
"users"."id" < 1 OR "users"."id" > 3
}
end
it 'can handle three dot ranges' do
node = @attr.not_in 1...3
@visitor.accept(node).must_be_like %{
"users"."id" < 1 OR "users"."id" >= 3
}
end
it 'can handle ranges bounded by infinity' do
node = @attr.not_in 1..Float::INFINITY
@visitor.accept(node).must_be_like %{
"users"."id" < 1
}
node = @attr.not_in(-Float::INFINITY..3)
@visitor.accept(node).must_be_like %{
"users"."id" > 3
}
node = @attr.not_in(-Float::INFINITY...3)
@visitor.accept(node).must_be_like %{
"users"."id" >= 3
}
node = @attr.not_in(-Float::INFINITY..Float::INFINITY)
@visitor.accept(node).must_be_like %{1=0}
end
it 'can handle subqueries' do
table = Table.new(:users)
subquery = table.project(:id).where(table[:name].eq('Aaron'))
node = @attr.not_in subquery
@visitor.accept(node).must_be_like %{
"users"."id" NOT IN (SELECT id FROM "users" WHERE "users"."name" = 'Aaron')
}
end
it 'uses the same column for escaping values' do
@attr = Table.new(:users)[:name]
visitor = Class.new(ToSql) do
attr_accessor :expected
def quote value, column = nil
raise unless column == expected
super
end
end
in_node = Nodes::NotIn.new @attr, %w{ a b c }
visitor = visitor.new(Table.engine.connection)
visitor.expected = Table.engine.connection.columns(:users).find { |x|
x.name == 'name'
}
visitor.accept(in_node).must_equal %("users"."name" NOT IN ('a', 'b', 'c'))
end
end
describe 'Equality' do
it "should escape strings" do
test = Table.new(:users)[:name].eq 'Aaron Patterson'
@visitor.accept(test).must_be_like %{
"users"."name" = 'Aaron Patterson'
}
end
end
describe 'Constants' do
it "should handle true" do
test = Table.new(:users).create_true
@visitor.accept(test).must_be_like %{
TRUE
}
end
it "should handle false" do
test = Table.new(:users).create_false
@visitor.accept(test).must_be_like %{
FALSE
}
end
end
describe 'TableAlias' do
it "should use the underlying table for checking columns" do
test = Table.new(:users).alias('zomgusers')[:id].eq '3'
@visitor.accept(test).must_be_like %{
"zomgusers"."id" = 3
}
end
end
describe 'distinct on' do
it 'raises not implemented error' do
core = Arel::Nodes::SelectCore.new
core.set_quantifier = Arel::Nodes::DistinctOn.new(Arel.sql('aaron'))
assert_raises(NotImplementedError) do
@visitor.accept(core)
end
end
end
end
end
end