ArangoDb::Base#save() returns nil after the first save

[art-solopov]

class TestDoc < ArangoDb::Base
  collection :test
end  
# Creating a new object
b = TestDoc.new
b.a = 10
#=> #<TestDoc:0x00000000f90920
# @index=#<ArangoDb::Index:0x00000000f907b8 @indices={:skiplist=>[]}>,
# @target=
#  #<ArangoDb::Document:0x00000000f90830
#   @attributes={},
#   @collection="test",
#   @db_attr_names=[]>,
# @transport=ArangoDb::Transport>
b.a = 10
#=> 10
b.n = 1
#=> 1
b.save
#=> nil
TestDoc.find("test/77990287")
#=> #<TestDoc:0x00000001192070
# @index=#<ArangoDb::Index:0x00000001191f80 @indices={:skiplist=>[]}>,
# @target=
#  #<ArangoDb::Document:0x00000001191ff8
#   @_id="test/77990287",
#   @_rev="77990287",
#   @attributes={"a"=>10, "_key"=>"77990287"},
#   @collection="test",
#   @db_attr_names=[],
#   @location="/_api/document/test/77990287">,
# @transport=ArangoDb::Transport>

As you can see, the document wasn't overwritten properly.
Ruby 2.1.0.

[okiess]

Are you running ArangoDB 1.4.x? I haven't updated for the most recent versions yet...

[art-solopov]

Yes. 1.4.5 to be precise...

[okiess]

Must be an issue with Ruby 2.1.0. The test suite works ok with Ruby 1.8.7 against ArangoDB 1.4.8. I'll try to look into the issue at the next chance...