Author Archives: James Lin

尋找他鄉的故事-音樂

www.youtube.com/watch?v=wnFKcPGpuTI&list=FLPHcCByWqBqikWWJRu9N35g&index=6&t=0s”>Himekami

尋找他鄉的故事-音樂 Valley Moons Himekami – 大地炎 Kitaro – Dance of Sarasvati

Meta class for DRF serializer to display JSON data

class JSONDataMetaclass(SerializerMetaclass):
    """Meta class to dynamically add SerializerMethodField and look up JSON data"""
    def __new__(cls, name, bases, attrs):

        for field in getattr(attrs.get('Meta'), 'json_fields', []):
            def _(self, obj):
                return obj.raw_data.get(field[1])

            attrs[field[0]] = serializers.SerializerMethodField()
            attrs['get_{}'.format(field[0])] = _
        return super(JSONDataMetaclass, cls).__new__(cls, name, bases, attrs)

class JSONDataMetaclass(SerializerMetaclass):

"""Meta class to dynamically add SerializerMethodField and look up JSON data"""

def __new__(cls, name, bases, attrs):

for field in getattr(attrs.get('Meta'), 'json_fields', []):

def _(self, obj):

return obj.raw_data.get(field[1])

attrs[field[0]] = serializers.SerializerMethodField()

attrs['get_{}'.format(field[0])] = _

return super(JSONDataMetaclass, cls).__new__(cls, name, bases, attrs)

Then you can use it by:

@six.add_metaclass(JSONDataMetaclass)
class ItemSerializer(serializers.ModelSerializer):
    class Meta:
        """Serializer config."""
        json_fields = [('asid', 'ASID'), ...]
        fields = [...]

@six.add_metaclass(JSONDataMetaclass)

class ItemSerializer(serializers.ModelSerializer):

class Meta:

"""Serializer config."""

json_fields = [('asid', 'ASID'), ...]

fields = [...]

Good references for writing tests

http://blog.codepipes.com/testing/software-testing-antipatterns.htm The above article talks about some anti-patterns in tests, personally I agree most of them especially anti-pattern on “Treating TDD as a religion”.

Ecosa vs Koala, a honest personal view

A few months ago, my wife had long complained about her back pain and has given the ultimatum, we needed to buy a new mattress or I will have a very bad relationship. There were quite a few ads popped up in facebook for a while, and at that time I couldn’t even distingue Ecosa… Read More »

8-bit CPU control signal overview

A very nice video illustrating how CPU works.

Making logic gates from transistors

A very nice video laying the fundamental of logic boards.

Simple ToDo API for everyone to play with

I just published a simple RESTful ToDo API to allow everyone to play with, this is typically useful for people learning Javascript frameworks that implement “TODO” feature as learning exercise. Without further ado, get started here.

Good Read: Being A Developer After 40

“In our industry, every technology generates what I call a “galaxy.” These galaxies feature stars but also black holes; meteoric changes that fade in the night, many planets, only a tiny fraction of which harbour some kind of life, and lots of cosmic dust and dark matter. Examples of galaxies are, for example, .NET, Cocoa, Node.js,… Read More »

Hand made Garden Beds For Sale $30

1200Length x 225Wide x 150Height in millimetres. various sizes can be made to order, different prices apply.

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