Question

在我的html模板中尝试{% set foo = 42 %}时收到以下错误消息。

set

下面我按照评论中的建议添加了完整的会话日志。

TemplateSyntaxError: Invalid block tag: 'set', expected 'endblock' or 'endblock content'

下面我添加了对*** Running dev_appserver with the following flags: --skip_sdk_update_check=yes --port=15093 --admin_port=8018 Python command: /usr/bin/python2.7 INFO 2016-05-14 18:36:26,513 devappserver2.py:762] Skipping SDK update check. INFO 2016-05-14 18:36:26,696 api_server.py:204] Starting API server at: http://localhost:56265 INFO 2016-05-14 18:36:26,701 dispatcher.py:197] Starting module "default" running at: http://localhost:15093 INFO 2016-05-14 18:36:26,704 admin_server.py:118] Starting admin server at: http://localhost:8018 ERROR 2016-05-14 18:37:48,778 webapp2.py:1528] Invalid block tag: 'set', expected 'endblock' or 'endblock content' Traceback (most recent call last): File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1511, in __call__ rv = self.handle_exception(request, response, e) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1505, in __call__ rv = self.router.dispatch(request, response) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1253, in default_dispatcher return route.handler_adapter(request, response) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1077, in __call__ return handler.dispatch() File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 547, in dispatch return self.handle_exception(e, self.app.debug) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 545, in dispatch return method(*args, **kwargs) File "/Users/brian/googleapps/lastturn/views.py", line 187, in get self.response.out.write(template.render(path, template_values)) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/webapp/template.py", line 91, in render t = _load_internal_django(template_path, debug) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/webapp/template.py", line 165, in _load_internal_django template = django.template.loader.get_template(file_name) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/loader.py", line 160, in get_template template = get_template_from_string(template, origin, template_name) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/loader.py", line 168, in get_template_from_string return Template(source, origin, name) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 158, in __init__ self.nodelist = compile_string(template_string, origin) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 186, in compile_string return parser.parse() File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 281, in parse compiled_result = compile_func(self, token) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/loader_tags.py", line 195, in do_extends nodelist = parser.parse() File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 281, in parse compiled_result = compile_func(self, token) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/loader_tags.py", line 173, in do_block nodelist = parser.parse(('endblock', 'endblock %s' % block_name)) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 279, in parse self.invalid_block_tag(token, command, parse_until) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 332, in invalid_block_tag raise self.error(token, "Invalid block tag: '%s', expected %s" % (command, get_text_list(["'%s'" % p for p in parse_until]))) TemplateSyntaxError: Invalid block tag: 'set', expected 'endblock' or 'endblock content' ERROR 2016-05-14 18:37:48,784 wsgi.py:279] Traceback (most recent call last): File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/runtime/wsgi.py", line 267, in Handle result = handler(dict(self._environ), self._StartResponse) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1519, in __call__ response = self._internal_error(e) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1511, in __call__ rv = self.handle_exception(request, response, e) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1505, in __call__ rv = self.router.dispatch(request, response) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1253, in default_dispatcher return route.handler_adapter(request, response) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1077, in __call__ return handler.dispatch() File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 547, in dispatch return self.handle_exception(e, self.app.debug) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 545, in dispatch return method(*args, **kwargs) File "/Users/brian/googleapps/lastturn/views.py", line 187, in get self.response.out.write(template.render(path, template_values)) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/webapp/template.py", line 91, in render t = _load_internal_django(template_path, debug) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/webapp/template.py", line 165, in _load_internal_django template = django.template.loader.get_template(file_name) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/loader.py", line 160, in get_template template = get_template_from_string(template, origin, template_name) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/loader.py", line 168, in get_template_from_string return Template(source, origin, name) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 158, in __init__ self.nodelist = compile_string(template_string, origin) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 186, in compile_string return parser.parse() File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 281, in parse compiled_result = compile_func(self, token) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/loader_tags.py", line 195, in do_extends nodelist = parser.parse() File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 281, in parse compiled_result = compile_func(self, token) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/loader_tags.py", line 173, in do_block nodelist = parser.parse(('endblock', 'endblock %s' % block_name)) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 279, in parse self.invalid_block_tag(token, command, parse_until) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/_internal/django/template/__init__.py", line 332, in invalid_block_tag raise self.error(token, "Invalid block tag: '%s', expected %s" % (command, get_text_list(["'%s'" % p for p in parse_until]))) TemplateSyntaxError: Invalid block tag: 'set', expected 'endblock' or 'endblock content' INFO 2016-05-14 18:37:48,792 module.py:812] default: "GET / HTTP/1.1" 500 -的修改。注释掉的行表示原始的jinja2环境声明。这些修订是对评论中提出的建议的回应。但我仍然得到相同的错误消息，似乎表明jinja2没有被使用。

views.py

以下是base.html模板。

TEMPLATE_DIR = os.path.join(os.path.dirname(__file__), 'templates')
#jinja_environment = \
#jinja2.Environment(loader=jinja2.FileSystemLoader(TEMPLATE_DIR))

JINJA_ENVIRONMENT = jinja2.Environment(
    loader=jinja2.FileSystemLoader(os.path.dirname(__file__)),
    extensions=['jinja2.ext.autoescape'],
    autoescape=True)

class BaseHandler(webapp2.RequestHandler):

    @webapp2.cached_property
    def jinja2(self):
        return jinja2.get_jinja2(app=self.app)

    def render_template(
        self,
        filename,
        template_values,
        **template_args
        ):
#template = jinja_environment.get_template(filename)
    template = JINJA_ENVIRONMENT.get_template(filename)
        self.response.out.write(template.render(template_values))

以下是实际模板的“核心”。通过“心脏”，我的意思是我遗漏了胆量，因为这只是一个测试。

<html>
  <head>
    <link rel="stylesheet" href="/static/css/reset.css">
    <link rel="stylesheet" href="/static/css/style.css">
  </head>
  <body>
    <div class="wrapper">
    {% block content %}
    {% endblock content %}
    </div>
  </body>
</html>

This answer suggests to me that jinja2 is not installed (properly?).

我是否还需要更改安装的其他部分？

This answer shows more input about ipython installation,但我使用的是 google-app-engine ，这可能会有所不同。下面的列表确认已安装Jinja2 2.8。

{% extends "base.html" %}
    {% block content %}
    <center>
        <h1>Create or edit your own Blog</h1>
      </center>
      {% set foo = 42 %}
      {{ foo }}

    {% endblock content %}

Answer 1

经过对我原始问题的评论的大量帮助，并且有很多绊脚石，我终于回答了我的问题。我对webapp2和Jinja都有一个template.render（）感到困惑，但它们是不同的。

来自webapp的

template.render（）似乎需要2个参数 - 路径和模板名称 - 而我当前的代码使用这种格式。但是，我想使用Jinja2，其中template.render（）只需要1个参数 - 模板名称。

根据google docs for using Jinja in the guestbook app，显示了以下格式。

JINJA_ENVIRONMENT = jinja2.Environment(
    loader=jinja2.FileSystemLoader(os.path.dirname(__file__)),
    extensions=['jinja2.ext.autoescape'],
    autoescape=True)

但事实证明，这与我选择的BaseHandler类不兼容，后者将模板放在他们自己的子目录中，＆＃34; templates＆＃34;。相反，我使用以下代码，其中TEMPLATE_DIR替换了＆＃34; loader =＆＃34;中的文件。句子。

TEMPLATE_DIR = os.path.join(os.path.dirname(__file__), 'templates')
JINJA_ENVIRONMENT = jinja2.Environment(
    loader=jinja2.FileSystemLoader(TEMPLATE_DIR ),
    extensions=['jinja2.ext.autoescape'],
    autoescape=True)

顺便说一下，我不再导入webapp template。我在我的＆＃34; get def＆＃34; s中使用以下样式。

template = JINJA_ENVIRONMENT.get_template('index.html')
self.response.out.write(template.render( template_values))

所以，尽管问题是＆＃34; Jinja安装问题＆＃34;，但这并不是安装问题，而是我将Jinja与现有的目录结构集成起来很困难。

Jinja2安装问题

1 个答案: