Jinja2 - 如何循环一个 json 列表？
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Jinja2 - How to loop a json list?
提问by laukok
How can I loop a json list with jinja2?
如何使用 jinja2 循环 json 列表？
I have this json list,
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": "Hand",
"user_id": 7,
"address": null
}
]
page.html,
页面.html，
<table>
{% for user in users %}
<tr><td>{{ user.first_name }}</td></tr>
{% endfor %}
</table>
Result,
结果，
<table>
<tr><td></td></tr>
<tr><td></td></tr>
<tr><td></td></tr>
<tr><td></td></tr>
...
Any ideas?
有任何想法吗？
回答by hiro protagonist
your json list contains dictionaries; you need to access the dictionary elements differently than you would class members; try:
您的 json 列表包含字典；您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>
this works for me (python 3.4 and python 2.7)
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))
output:
输出：
<table>
<tr><td>John</td></tr>
<tr><td>Jane</td></tr>
<tr><td>Dom</td></tr>
<tr><td>Pete</td></tr>
</table>
回答by Majid Zandi
simple json iteration in jinja2
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>
