python flask/jinja...

jninja模版与编码.md

jinja渲染模版时，参数中的非ASCII内容必须是unicode类型

所以以下写法均会抛出UnicodeDecodeError

• template.render(name="校长")
• template.render(re={"name": "校长"})

结论二

• jinja模版中，字符串字面量如{{ }},local变量等中显示给出字符串数据可以是str或unicode，即{{ "校长" }}和{{ u"校长" }}都是正确的，{% set a, b = '校长', u'校长' %}
• 传给jinja模版中的python变量中的字符串数据必须是unicode，这些变量包括global变量、context变量和filters函数返回的值

python-flask.md

python flask/jinja...

test_jinja2.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from jinja2 import Template, UndefinedError
import pytest
from attrdict import AttrDict


def test_print():
    print "hello"
    assert True


def test_simple():
    template = Template("Hello {{name}} from:{{sender}}")

    assert "Hello Jack from:Lucy" == template.render(name="Jack", sender="Lucy")

    assert "Hello Jack from:" == template.render(name="Jack")
    assert u"Hello Jack from:" == template.render(name="Jack")
    assert "Hello Jack from:" == template.render(name=u"Jack")

    assert u"Hello Jack from:Lucy" == template.render(name=u"Jack", sender="Lucy")

    assert type(template.render(name=u"Jack", sender="Lucy")) is unicode
    
def test_ch():
    template = Template("Hello {{name}} from:{{sender}}")
    with pytest.raises(UnicodeDecodeError):
        assert "Hello Jack from:校长" == template.render(name="Jack", sender="校长")
    assert u"Hello Jack from:校长" == template.render(name="Jack", sender=u"校长")
    assert "Hello Jack from:校长" != template.render(name="Jack", sender=u"校长")


common_template = "Hi {{msg}}. My name is {{user.name}}, and {{user.age}} years old. I come from {{user.country}}"
common_render = "Hi everyone. My name is jack, and 18 years old. I come from China"
common_render_none = "Hi . My name is , and  years old. I come from "

def test_dict():
    template = Template(common_template)
    user = {
        "name": "jack",
        "age": 18,
        "country": "China",
    }

    result = template.render(user=user, msg="everyone")

    assert common_render == result
    assert type(result) is unicode

    user = {
        'name': u"jack",
        u'age': "18",
        u'country': u"China",
    }

    result = template.render(user=user, msg="everyone")

    assert common_render == result
    assert type(result) is unicode


def test_None():

    template = Template("Hello {{name}} from:{{sender}}")
    assert "Hello  from:" == template.render()
    assert "Hello None from:" == template.render(name=None)

    template = Template(common_template)
    with pytest.raises(UndefinedError):
        result = template.render(msg="world")

    assert common_render_none == template.render(user=None)
    assert template.render(user={}) == template.render(user=None)
    assert template.render(user=object()) == template.render(user=None)
    assert template.render(user=AttrDict({})) == template.render(user=None)