jinja2

问题 I'm writing a Jinja macro to render some form data in a template, but for some reason the form data renders as escaped text instead of html! Here is my macro, with the first row of the form called: {% macro formrow(field) %} <tr> <td>form.{{ field }}.label|safe</td> <td>form.{{ field }}|safe</td> <td>form.{{ field }}.help_text|safe</td> <td>form.{{ field }}.errors|safe</td> </tr> {% endmacro %} {{ formrow('item_name') }} Ideas? What am I missing? 回答1: It seems you are not getting the Jinja

问题 forms.py my_field = TextField(u"Enter a number", validators=[Required('This Field is Required')]) my_form.html <table> <tr> <td colspan="4"> {{form.my_field(placeholder= form.my_field.label.text, class_="form-control")}} {% for error in form.my_field.errors %} <span>{{error}}</span> {% endfor %} </td> </tr> </table> This is a simple code. But I want to follow kind of this to render all the input fields in a loop instead of writing the code for each of them. But each field will have a

问题 I am trying to get all undefined variables from a Jinja2 template. Assume that I have a template like below. tmpstr = """ {% for row in csv %} sample {{row.field1}} stuff {{row.field2}} morestuff {{row.field3}} {% endfor %} """ and input dictionary as below cxt = {'csv': [ {'field3': 1234, 'field4': 12314}, {'field3': 2222, 'field4': 1213} ]} Here is how I try to render it. env = Environment(undefined=Undefined) tmp = env.from_string(tmpstr) tmpsrc = tmp.render(cxt) print(tmpsrc) Template

问题 I have a jinja template that is the only content inside a set of div tags. <div id="section0"> {% include 'temppage.html' %} </div> When I press a button, I want to replace everything between the tags with something else. I was hoping to replace it with another jinja template, "{% include 'realpage.html' %}", but first I am unsure of how to replace the entire section, instead of just replacing a single word. Second, can I even add a jinja template dynamically, or do I need replace it with a

问题 Most of my locations have 4+ DNS sources, but a few have less. Each location gets their own dns4_ips list variable like this: dns4_ips: - dns_A - dns_B - dns_C - dns_C My resolv.conf template looks like this: domain example.com search example.com dom2.example.com dom3.example.com {% for nameserver in (dns4_ips|shuffle(seed=inventory_hostname)) %} nameserver {{nameserver}} {% endfor %} The Jinja for loop works great, but in the cases where I have numerous nameservers I'd rather only list the

问题 Most of my locations have 4+ DNS sources, but a few have less. Each location gets their own dns4_ips list variable like this: dns4_ips: - dns_A - dns_B - dns_C - dns_C My resolv.conf template looks like this: domain example.com search example.com dom2.example.com dom3.example.com {% for nameserver in (dns4_ips|shuffle(seed=inventory_hostname)) %} nameserver {{nameserver}} {% endfor %} The Jinja for loop works great, but in the cases where I have numerous nameservers I'd rather only list the

问题 By default Flask renders empty values for undefined attributes in Jinja templates. I want to raise an error instead. How can I change this behavior in Flask? Hello, {{ name }}! render_template('index.html') Hello, ! 回答1: Change the Flask app's Jinja env's undefined class to be StrictUndefined . from flask import Flask from jinja2 import StrictUndefined app = Flask(__name__) app.jinja_env.undefined = StrictUndefined If a template tries to use a variable that is undefined (except to test if it

问题 Is there a tidy-like tool or a tidy configuration, which works fine with Jinja2 templates? The default tidy has problems with Jinja code in attributes and Jinja-loops are formated in an unreadable way. My main requirement is to get the indentation level right. Everything else is nice to have, but not required. 回答1: You probably want a standalone tool and your question is old, so you've probably already solved it, but just in case this could be helpful. Some editors can handle jinja indent.

问题 I've simple 2 line code : @app.route('/contact/') def contact(): flash('We are reachable at ') return render_template('contact.html') I get the message 'We are reachable at' at /contact but it appears are normal text message. It doesn't background color(blue) or disappears after seconds. where contact.html contains {% extends "layout.html" %} {% block title %}Contact{% endblock title %} {% block body %} <h2> Contact Us </h2> Your email address must be valid as this is where reply will be sent

问题 This question already has an answer here : Reference template variable within Jinja expression (1 answer) Closed 3 years ago . What is the right way to write something like this in jinja2 : {% for items in zipped %} <img src="{{ url_for('static', filename='img/{{items.logo}}') }}" /> Notice that items.logo is within another variable . 回答1: items.logo is already a variable. Try: {% for items in zipped %} <img src="{{ url_for('static', filename='img/' + items.logo) }}" /> {% endfor %} 来源： https