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require_relative "spec_helper"
require 'yaml'
describe "Sequel::Plugins::LazyAttributes" do
before do
@db = Sequel.mock
def @db.supports_schema_parsing?() true end
def @db.schema(*a) [[:id, {:type=>:integer}], [:name,{:type=>:string}]] end
class ::LazyAttributesModel < Sequel::Model(@db[:la])
plugin :lazy_attributes
set_columns([:id, :name])
def self.columns; [:id, :name] end
lazy_attributes :name
def self.columns; [:id] end
set_dataset dataset.with_fetch(proc do |sql|
if sql !~ /WHERE/
if sql =~ /name/
[{:id=>1, :name=>'1'}, {:id=>2, :name=>'2'}]
else
[{:id=>1}, {:id=>2}]
end
else
if sql =~ /id IN \(([\d, ]+)\)/
$1.split(', ')
elsif sql =~ /id = (\d)/
[$1]
end.map do |x|
if sql =~ /SELECT (la.)?name FROM/
{:name=>x.to_s}
else
{:id=>x.to_i, :name=>x.to_s}
end
end
end
end)
end
@c = ::LazyAttributesModel
@ds = LazyAttributesModel.dataset
@db.sqls
end
after do
Object.send(:remove_const, :LazyAttributesModel)
end
it "should allowing adding additional lazy attributes via plugin :lazy_attributes" do
@c.set_dataset(@ds.select(:id, :blah))
@c.dataset.sql.must_equal 'SELECT id, blah FROM la'
@c.plugin :lazy_attributes, :blah
@c.dataset.sql.must_equal 'SELECT id FROM la'
end
it "should allowing adding additional lazy attributes via lazy_attributes" do
@c.set_dataset(@ds.select(:id, :blah))
@c.dataset.sql.must_equal 'SELECT id, blah FROM la'
@c.lazy_attributes :blah
@c.dataset.sql.must_equal 'SELECT id FROM la'
end
it "should handle lazy attributes that are qualified in the selection" do
@c.set_dataset(@ds.select(Sequel[:la][:id], Sequel[:la][:blah]))
@c.dataset.sql.must_equal 'SELECT la.id, la.blah FROM la'
@c.plugin :lazy_attributes, :blah
@c.dataset.sql.must_equal 'SELECT la.id FROM la'
end
with_symbol_splitting "should handle lazy attributes that are qualified in the selection using symbol splitting" do
@c.set_dataset(@ds.select(:la__id, :la__blah))
@c.dataset.sql.must_equal 'SELECT la.id, la.blah FROM la'
@c.plugin :lazy_attributes, :blah
@c.dataset.sql.must_equal 'SELECT la.id FROM la'
end
it "should remove the attributes given from the SELECT columns of the model's dataset" do
@ds.sql.must_equal 'SELECT la.id FROM la'
end
it "should still typecast correctly in lazy loaded column setters" do
m = @c.new
m.name = 1
m.name.must_equal '1'
end
it "should raise error if the model has no primary key" do
m = @c.first
@c.no_primary_key
proc{m.name}.must_raise(Sequel::Error)
end
it "should lazily load the attribute for a single model object" do
m = @c.first
m.values.must_equal(:id=>1)
m.name.must_equal '1'
m.values.must_equal(:id=>1, :name=>'1')
@db.sqls.must_equal ['SELECT la.id FROM la LIMIT 1', 'SELECT la.name FROM la WHERE (id = 1) LIMIT 1']
end
it "should lazily load the attribute for a frozen model object" do
m = @c.first
m.freeze
m.name.must_equal '1'
@db.sqls.must_equal ['SELECT la.id FROM la LIMIT 1', 'SELECT la.name FROM la WHERE (id = 1) LIMIT 1']
m.name.must_equal '1'
@db.sqls.must_equal ['SELECT la.name FROM la WHERE (id = 1) LIMIT 1']
end
it "should not lazily load the attribute for a single model object if the value already exists" do
m = @c.first
m.values.must_equal(:id=>1)
m[:name] = '1'
m.name.must_equal '1'
m.values.must_equal(:id=>1, :name=>'1')
@db.sqls.must_equal ['SELECT la.id FROM la LIMIT 1']
end
it "should not lazily load the attribute for a single model object if it is a new record" do
m = @c.new
m.values.must_equal({})
m.name.must_be_nil
@db.sqls.must_equal []
end
it "should eagerly load the attribute for all model objects reteived with it" do
ms = @c.all
ms.map{|m| m.values}.must_equal [{:id=>1}, {:id=>2}]
ms.map{|m| m.name}.must_equal %w'1 2'
ms.map{|m| m.values}.must_equal [{:id=>1, :name=>'1'}, {:id=>2, :name=>'2'}]
sqls = @db.sqls
['SELECT la.id, la.name FROM la WHERE (la.id IN (1, 2))',
'SELECT la.id, la.name FROM la WHERE (la.id IN (2, 1))'].must_include(sqls.pop)
sqls.must_equal ['SELECT la.id FROM la']
end
it "should not eagerly load the attribute if model instance is frozen, and deal with other frozen instances if not frozen" do
ms = @c.all
ms.first.freeze
ms.map{|m| m.name}.must_equal %w'1 2'
@db.sqls.must_equal ['SELECT la.id FROM la', 'SELECT la.name FROM la WHERE (id = 1) LIMIT 1', 'SELECT la.id, la.name FROM la WHERE (la.id IN (2))']
end
it "should add the accessors to a module included in the class, so they can be easily overridden" do
@c.class_eval do
def name
"#{super}-blah"
end
end
ms = @c.all
ms.map{|m| m.values}.must_equal [{:id=>1}, {:id=>2}]
ms.map{|m| m.name}.must_equal %w'1-blah 2-blah'
ms.map{|m| m.values}.must_equal [{:id=>1, :name=>'1'}, {:id=>2, :name=>'2'}]
sqls = @db.sqls
['SELECT la.id, la.name FROM la WHERE (la.id IN (1, 2))',
'SELECT la.id, la.name FROM la WHERE (la.id IN (2, 1))'].must_include(sqls.pop)
sqls.must_equal ['SELECT la.id FROM la']
end
it "should work with the serialization plugin" do
@c.plugin :serialization, :yaml, :name
@ds = @c.dataset = @ds.with_fetch([[{:id=>1}, {:id=>2}], [{:id=>1, :name=>"--- 3\n"}, {:id=>2, :name=>"--- 6\n"}], [{:id=>1}], [{:name=>"--- 3\n"}]])
ms = @ds.all
ms.map{|m| m.values}.must_equal [{:id=>1}, {:id=>2}]
ms.map{|m| m.name}.must_equal [3,6]
ms.map{|m| m.values}.must_equal [{:id=>1, :name=>"--- 3\n"}, {:id=>2, :name=>"--- 6\n"}]
ms.map{|m| m.deserialized_values}.must_equal [{:name=>3}, {:name=>6}]
ms.map{|m| m.name}.must_equal [3,6]
sqls = @db.sqls
['SELECT la.id, la.name FROM la WHERE (la.id IN (1, 2))',
'SELECT la.id, la.name FROM la WHERE (la.id IN (2, 1))'].must_include(sqls.pop)
sqls.must_equal ['SELECT la.id FROM la']
m = @ds.first
m.values.must_equal(:id=>1)
m.name.must_equal 3
m.values.must_equal(:id=>1, :name=>"--- 3\n")
m.deserialized_values.must_equal(:name=>3)
m.name.must_equal 3
@db.sqls.must_equal ["SELECT la.id FROM la LIMIT 1", "SELECT la.name FROM la WHERE (id = 1) LIMIT 1"]
end
it "should not allow additional lazy attributes after freezing" do
@c.plugin :lazy_attributes, :blah
@c.freeze
proc{@c.lazy_attributes :name}.must_raise RuntimeError, TypeError
end
end
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