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Error with macros
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| {% from "macros.html" import nav_link with context %} | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Flask Template Example</title> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <style> | |
| div#main { | |
| max-width: 500px; | |
| padding: 20px; | |
| } | |
| nav .title { | |
| font-weight: bold; | |
| } | |
| a.active { | |
| font-weight: bold; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <ul class="nav navbar-nav"> | |
| {{ nav_link('home', 'Home') }} | |
| {{ nav_link('about', 'About') }} | |
| {{ nav_link('contact', 'Contact Us') }} | |
| </ul> | |
| <div id="main"> | |
| <h2>This is part of my base template</h2> | |
| <br> | |
| {% block content %}{% endblock %} | |
| <br> | |
| <h2>This is part of my base template</h2> | |
| </div> | |
| </body> | |
| <footer> | |
| {% block footer %} | |
| Watch! This part of the footer is coming from the base template.... | |
| <br> | |
| <br> | |
| {% endblock %} | |
| </footer> | |
| </html> |
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| {% macro nav_link(endpoint, name) %} | |
| {% if request.endpoint.endswith(endpoint) %} | |
| <a href="{{ url_for(endpoint) }}" class="active">{{name}}</a> | |
| {% else %} | |
| <a href="{{ url_for(endpoint) }}">{{name}}</a> | |
| {% endif %} | |
| {% endmacro %} |
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| from flask import Flask, render_template | |
| from datetime import datetime | |
| app = Flask(__name__) | |
| @app.route('/') | |
| def template_test(): | |
| return render_template('template.html', my_string='Wheeeee!', my_list=[0,1,2,3,4,5]) | |
| @app.route("/home") | |
| def home(): | |
| return render_template('template.html', | |
| my_string="I'm the home page", | |
| my_list=[0,1,2,3,4,5], | |
| ) | |
| ''' | |
| @app.route("/about") | |
| def about(): | |
| return render_template('template.html', | |
| my_string="I'm the about page", | |
| my_list=[0,1,2,3,4,5], | |
| ) | |
| @app.route("/contact") | |
| def contact(): | |
| return render_template('template.html', | |
| my_string="I'm the contact page", | |
| my_list=[0,1,2,3,4,5], | |
| current_time=datetime.datetime.now() | |
| ) | |
| @app.template_filter("fomatdate") | |
| def datetimefilter(value, format='%Y/%m/%d %H:%M'): | |
| """Convert a datetime to a different format.""" | |
| return value.strftime(format) | |
| ''' | |
| if __name__ == '__main__': | |
| app.run(debug=True, host='0.0.0.0', port=8080) |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Flask Template Example</title> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <style> | |
| div#main { | |
| max-width: 500px; | |
| padding: 20px; | |
| } | |
| nav .title { | |
| font-weight: bold; | |
| } | |
| a.active { | |
| font-weight: bold; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="main"> | |
| {% extends "base.html" %} | |
| {% block content %} | |
| <h3> This is the start of my child template</h3> | |
| <br> | |
| <p>My string: {{my_string}}</p> | |
| <p>Value from the list: {{my_list[1]}}</p> | |
| <p>Loop through the list:</p> | |
| <ul> | |
| {% for n in my_list %} | |
| <li>{{n}}</li> | |
| {% endfor %} | |
| </ul> | |
| <h3> This is the end of my child template</h3> | |
| {% endblock %} | |
| </div> | |
| </body> | |
| {% block footer %} | |
| {{super()}} | |
| ...and this addition to the footer is coming from the child template. | |
| {% endblock %} | |
| </html> |
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| werkzeug.routing.BuildError | |
| BuildError: ('about', {}, None) | |
| Traceback (most recent call last) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__ | |
| return self.wsgi_app(environ, start_response) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app | |
| response = self.make_response(self.handle_exception(e)) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception | |
| reraise(exc_type, exc_value, tb) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app | |
| response = self.full_dispatch_request() | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request | |
| rv = self.handle_user_exception(e) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception | |
| reraise(exc_type, exc_value, tb) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request | |
| rv = self.dispatch_request() | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request | |
| return self.view_functions[rule.endpoint](**req.view_args) | |
| File "/home/action/thinkful/projects/jinja_example/run.py", line 8, in template_test | |
| return render_template('template.html', my_string='Wheeeee!', my_list=[0,1,2,3,4,5]) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/templating.py", line 128, in render_template | |
| context, ctx.app) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/templating.py", line 110, in _render | |
| rv = template.render(context) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/jinja2/environment.py", line 969, in render | |
| return self.environment.handle_exception(exc_info, True) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/jinja2/environment.py", line 742, in handle_exception | |
| reraise(exc_type, exc_value, tb) | |
| File "/home/action/thinkful/projects/jinja_example/templates/template.html", line 23, in top-level template code | |
| {% extends "base.html" %} | |
| File "/home/action/thinkful/projects/jinja_example/templates/base.html", line 25, in top-level template code | |
| {{ nav_link('about', 'About') }} | |
| File "/home/action/thinkful/projects/jinja_example/templates/macros.html", line 5, in template | |
| <a href="{{ url_for(endpoint) }}">{{name}}</a> | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/helpers.py", line 312, in url_for | |
| return appctx.app.handle_url_build_error(error, endpoint, values) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/app.py", line 1641, in handle_url_build_error | |
| reraise(exc_type, exc_value, tb) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/flask/helpers.py", line 305, in url_for | |
| force_external=external) | |
| File "/home/action/thinkful/projects/jinja_example/env/lib/python2.7/site-packages/werkzeug/routing.py", line 1649, in build | |
| raise BuildError(endpoint, values, method) | |
| BuildError: ('about', {}, None) | |
| The debugger caught an exception in your WSGI application. You can now look at the traceback which led to the error. | |
| To switch between the interactive traceback and the plaintext one, you can click on the "Traceback" headline. From the text traceback you can also create a paste of it. For code execution mouse-over the frame you want to debug and click on the console icon on the right side. | |
| You can execute arbitrary Python code in the stack frames and there are some extra helpers available for introspection: | |
| dump() shows all variables in the frame | |
| dump(obj) dumps all that's known about the object |
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