django 自定义标签内联或 block

Question

我想知道是否有办法检查标签是否有结束块。我基本上是想让用户做

{% mytag 'a' 'b' 'c' %}

或者

{% mytag 'a' 'b' 'c' %}
    <!-- other markup here -->
{% end mytag %}

我看到如果它不存在它会引发异常，但是有没有办法以编程方式设置我的标签来安全地处理这两种情况？

Answer 1

您可以尝试解析直到结束标记并在未找到异常时捕获异常。如果您也遇到另一个 mytag 节点，您可能想停止:

def do_mytag_stuff(parser, token):

    # Process your token however you need
    mytag_args = token.split_contents()

    try:
        nodelist = parser.parse(('endmytag', 'mytag'))
        token = parser.next_token()
        if token.contents == 'endmytag':
            # Found an ending tag, make a node for its contents
            parser.delete_first_token()
            return MyTagNode(nodelist, mytag_args)

    except TemplateSyntaxError:
        # Neither tag was found
        pass

    # So either there's no closing tag, or we met another mytag before a closing tag. 
    # Do whatever you would for a single tag here
    return SingleMyTagNode(mytag_args)

不确定这是否 100% 正确，但希望它会有所帮助。