如何使用jinja2循环json列表?
我有这个json列表,
[{“first_name”:“John”,“last_name”:“Smith”,“user_id”:4,“address”:null},{“first_name”:“Jane”,“last_name”:“Heart”,“user_id “:5,”address“:null},{”first_name“:”Dom“,”last_name“:”Robinsons“,”user_id“:6,”address“:null},{”first_name“:”Pete“, “last_name”:“手”,“user_id”:7,“地址”:null}]
page.html中,
<table>
{% for user in users %}
<tr><td>{{ user.first_name }}</td></tr>
{% endfor %}
</table>
结果,
<table>
<tr><td></td></tr>
<tr><td></td></tr>
<tr><td></td></tr>
<tr><td></td></tr>
...
有任何想法吗?
你的json列表包含字典;你需要以不同于类成员的方式访问字典元素;尝试:
<tr><td>{{ user['first_name'] }}</td></tr>
这对我有用(python 3.4和python 2.7)
import json
from jinja2 import Template
json_str = '''[{"first_name": "John", "last_name": "Smith", "user_id": 4,
"address": null}, {"first_name": "Jane", "last_name": "Heart",
"user_id": 5, "address": null}, {"first_name": "Dom",
"last_name": "Robinsons", "user_id": 6, "address": null},
{"first_name": "Pete", "last_name": "Hand", "user_id": 7,
"address": null}]'''
users = json.loads(json_str)
tmpl = Template('''
<table>
{% for user in users %}
<tr><td>{{ user['first_name'] }}</td></tr>
{% endfor %}
</table>
''')
print(tmpl.render(users = users))
输出:
<table>
<tr><td>John</td></tr>
<tr><td>Jane</td></tr>
<tr><td>Dom</td></tr>
<tr><td>Pete</td></tr>
</table>
jinja2中的简单json迭代
<table>
<tr>
{% for key in users[0] %}
<th>{{ key }}</th>
{% endfor %}
</tr>
{% for user in users %}
<tr>
{% for key in user %}
<td>{{ user[key] }}</td>
{% endfor %}
</tr>
{% endfor %}
</table>