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require_relative "spec_helper"
describe Sequel::Model, "caching" do
before do
@cache_class = Class.new(Hash) do
attr_accessor :ttl
def set(k, v, ttl); self[k] = v; @ttl = ttl; end
def get(k); self[k]; end
end
cache = @cache_class.new
@cache = cache
@memcached_class = Class.new(Hash) do
attr_accessor :ttl
def set(k, v, ttl); self[k] = v; @ttl = ttl; end
def get(k); if self[k] then return self[k]; else raise ArgumentError; end end
def delete(k); if self[k] then super; else raise ArgumentError; end end
end
cache2 = @memcached_class.new
@memcached = cache2
@c = Class.new(Sequel::Model(:items))
@c.class_eval do
plugin :caching, cache
def self.name; 'Item' end
columns :name, :id
end
@c3 = Class.new(Sequel::Model(:items))
@c3.class_eval do
plugin :caching, cache2
def self.name; 'Item' end
columns :name, :id
end
@c4 = Class.new(Sequel::Model(:items))
@c4.class_eval do
plugin :caching, cache2, :ignore_exceptions => true
def self.name; 'Item' end
columns :name, :id
end
@c2 = Class.new(@c) do
def self.name; 'SubItem' end
end
[@c, @c2, @c3, @c4].each do |c|
c.dataset = c.dataset.with_fetch(:name => 'sharon'.dup, :id => 1).with_numrows(1)
end
@c.db.reset
end
it "should set the model's cache store" do
@c.cache_store.wont_be_nil
@c2.cache_store.wont_be_nil
end
it "should have a default ttl of 3600" do
@c.cache_ttl.must_equal 3600
@c2.cache_ttl.must_equal 3600
end
it "should take a ttl option" do
c = Class.new(Sequel::Model(:items))
c.plugin :caching, @cache, :ttl => 1234
c.cache_ttl.must_equal 1234
Class.new(c).cache_ttl.must_equal 1234
end
it "should allow overriding the ttl option via a plugin :caching call" do
@c.plugin :caching, @cache, :ttl => 1234
@c.cache_ttl.must_equal 1234
Class.new(@c).cache_ttl.must_equal 1234
end
it "should offer a set_cache_ttl method for setting the ttl" do
@c.cache_ttl.must_equal 3600
@c.set_cache_ttl 1234
@c.cache_ttl.must_equal 1234
Class.new(@c).cache_ttl.must_equal 1234
end
it "should generate a cache key appropriate to the class via the Model#cache_key" do
m = @c.new
m.values[:id] = 1
m.cache_key.must_equal "#{m.class}:1"
m = @c2.new
m.values[:id] = 1
m.cache_key.must_equal "#{m.class}:1"
# custom primary key
@c.set_primary_key :ttt
m = @c.new
m.values[:ttt] = 333
m.cache_key.must_equal "#{m.class}:333"
c = Class.new(@c)
m = c.new
m.values[:ttt] = 333
m.cache_key.must_equal "#{m.class}:333"
# composite primary key
@c.set_primary_key [:a, :b, :c]
m = @c.new
m.values[:a] = 123
m.values[:c] = 456
m.values[:b] = 789
m.cache_key.must_equal "#{m.class}:123,789,456"
c = Class.new(@c)
m = c.new
m.values[:a] = 123
m.values[:c] = 456
m.values[:b] = 789
m.cache_key.must_equal "#{m.class}:123,789,456"
end
it "should generate a cache key via the Model.cache_key method" do
@c.cache_key(1).must_equal "#{@c}:1"
@c.cache_key([1, 2]).must_equal "#{@c}:1,2"
end
it "should raise error if attempting to generate cache_key and primary key value is null" do
m = @c.new
proc {m.cache_key}.must_raise(Sequel::Error)
m.values[:id] = 1
m.cache_key
m = @c2.new
proc {m.cache_key}.must_raise(Sequel::Error)
m.values[:id] = 1
m.cache_key
end
it "should not raise error if trying to save a new record" do
@c.new(:name=>'blah').save
@c.create(:name=>'blah')
@c2.new(:name=>'blah').save
@c2.create(:name=>'blah')
end
it "should set the cache when reading from the database" do
@c.db.sqls.must_equal []
@cache.must_be :empty?
m = @c[1]
@c.db.sqls.must_equal ['SELECT * FROM items WHERE id = 1']
m.values.must_equal(:name=>"sharon", :id=>1)
@cache[m.cache_key].must_equal m
m2 = @c[1]
@c.db.sqls.must_equal []
m2.must_equal m
m2.values.must_equal(:name=>"sharon", :id=>1)
m = @c2[1]
@c.db.sqls.must_equal ['SELECT * FROM items WHERE id = 1']
m.values.must_equal(:name=>"sharon", :id=>1)
@cache[m.cache_key].must_equal m
m2 = @c2[1]
@c.db.sqls.must_equal []
m2.must_equal m
m2.values.must_equal(:name=>"sharon", :id=>1)
end
it "should handle lookups by nil primary keys" do
@c[nil].must_be_nil
@c.db.sqls.must_equal []
end
it "should delete the cache when writing to the database" do
m = @c[1]
@cache[m.cache_key].must_equal m
m.name = 'hey'
m.save
@cache.has_key?(m.cache_key).must_equal false
@c.db.sqls.must_equal ["SELECT * FROM items WHERE id = 1", "UPDATE items SET name = 'hey' WHERE (id = 1)"]
m = @c2[1]
@cache[m.cache_key].must_equal m
m.name = 'hey'
m.save
@cache.has_key?(m.cache_key).must_equal false
@c.db.sqls.must_equal ["SELECT * FROM items WHERE id = 1", "UPDATE items SET name = 'hey' WHERE (id = 1)"]
end
it "should delete the cache when deleting the record" do
m = @c[1]
@cache[m.cache_key].must_equal m
m.delete
@cache.has_key?(m.cache_key).must_equal false
@c.db.sqls.must_equal ["SELECT * FROM items WHERE id = 1", "DELETE FROM items WHERE id = 1"]
m = @c2[1]
@cache[m.cache_key].must_equal m
m.delete
@cache.has_key?(m.cache_key).must_equal false
@c.db.sqls.must_equal ["SELECT * FROM items WHERE id = 1", "DELETE FROM items WHERE id = 1"]
end
it "should support #[] as a shortcut to #find with hash" do
m = @c[:id => 3]
@cache[m.cache_key].must_be_nil
@c.db.sqls.must_equal ["SELECT * FROM items WHERE (id = 3) LIMIT 1"]
m = @c[1]
@cache[m.cache_key].must_equal m
@c.db.sqls.must_equal ["SELECT * FROM items WHERE id = 1"]
@c[:id => 4]
@c.db.sqls.must_equal ["SELECT * FROM items WHERE (id = 4) LIMIT 1"]
m = @c2[:id => 3]
@cache[m.cache_key].must_be_nil
@c.db.sqls.must_equal ["SELECT * FROM items WHERE (id = 3) LIMIT 1"]
m = @c2[1]
@cache[m.cache_key].must_equal m
@c.db.sqls.must_equal ["SELECT * FROM items WHERE id = 1"]
@c2[:id => 4]
@c.db.sqls.must_equal ["SELECT * FROM items WHERE (id = 4) LIMIT 1"]
end
it "should support ignore_exception option" do
c = Class.new(Sequel::Model(:items))
c.plugin :caching, @cache, :ignore_exceptions => true
Class.new(c).cache_ignore_exceptions.must_equal true
end
it "should raise an exception if cache_store is memcached and ignore_exception is not enabled" do
proc{@c3[1]}.must_raise ArgumentError
m = @c3.new.save
proc{m.update({:name=>'blah'})}.must_raise ArgumentError
end
it "should rescue an exception if cache_store is memcached and ignore_exception is enabled" do
@c4[1].values.must_equal(:name => 'sharon', :id => 1)
@c4.dataset = @c4.dataset.with_fetch(:name => 'sharon', :id => 1, :x=>1)
m = @c4.new.save
m.update({:name=>'blah'})
m.values.must_equal(:name => 'blah', :id => 1, :x => 1)
end
it "should support Model.cache_get_pk for getting a value from the cache by primary key" do
@c.cache_get_pk(1).must_be_nil
m = @c[1]
@c.cache_get_pk(1).must_equal m
end
it "should support Model.cache_delete_pk for removing a value from the cache by primary key" do
@c[1]
@c.cache_get_pk(1).wont_equal nil
@c.cache_delete_pk(1).must_be_nil
@c.cache_get_pk(1).must_be_nil
end
it "should support overriding the cache key prefix" do
c2 = Class.new(@c)
def c2.cache_key_prefix; "ceetwo" end
c3 = Class.new(c2)
@c.cache_key(:id).wont_equal c2.cache_key(:id)
c2.cache_key(:id).must_equal c3.cache_key(:id)
@c[1]
c2.cache_get_pk(1).must_be_nil
m = c2[1]
c2.cache_get_pk(1).values.must_equal @c[1].values
c3.cache_get_pk(1).values.must_equal m.values
m.name << m.name
m.save
c2[1].values.must_equal c3[1].values
end
end
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