Django 1.9 TemplateSyntaxError 无法解析剩余部分：来自 'game.status==' 的'=='

Question

我无法确定问题出在哪里。

本质上，我正在尝试通过渲染将上下文（映射到游戏对象列表的命名键的字典）传递给 html sn-p。列表中的每个游戏都属于具有单个字符状态字段的 Game 类。我在游戏列表上有一个“for”循环所以我试图使用“if”标签来访问状态并相应地显示一条消息。渲染sn-p时出现问题，给我报错：TemplateSyntaxError at /user/home Could not parse the remainder: '==' from 'game.status=='

我相信这与尝试访问游戏的状态属性有关。 这是该类的一些代码：

class Game(models.Model):
    first_player = models.ForeignKey(User, related_name="games_first_player")
    second_player = models.ForeignKey(User, related_name="games_second_player")
    next_to_move = models.ForeignKey(User, related_name="games_to_move")
    start_time = models.DateTimeField(auto_now_add=True)
    last_active = models.DateTimeField(auto_now=True)
    status = models.CharField(max_length=1, default="A", choices=GAME_STATUS_CHOICES)

    objects = GamesManager()

这是生成列表并将其传递给渲染的视图

def home(request):
    my_games = Game.objects.games_for_user(request.user)
    active_games = my_games.filter(status="A")
    finished_games = my_games.exclude(status="A")
    waiting_games = active_games.filter(next_to_move=request.user)
    other_games = active_games.exclude(next_to_move=request.user)
    context = Context({'other_games': other_games,
                       'waiting_games': waiting_games,
                       'finished_games': finished_games})
    return render(request, 'user/home.html', context)

这里是 user/home.html 的相关部分

        <h3> Here is your current overview:</h3>

    {% block content %}
      <div class="well col-md-6">
          {% include "tictactoe/game_list_snippet.html" with header="Games Awaiting Your Move" games_list=waiting_games %}
          {% include "tictactoe/game_list_snippet.html" with header="Waiting Games" games_list=other_games %}
          {% include "tictactoe/game_list_snippet.html" with header="Finished Games" games_list=finished_games %}
      </div>
    {%  endblock content %}

最后是sn-p

<div class="list-group">
{% for game in games_list %}
    <a class="list-group-item" href="#">
    {{ game }}:
    {% if game.status == "A" %}
      {% if game.next_to_move == user %}Your Turn{% else %} Waiting for opponents turn {% endif %}
    {% elif game.status== "D" %}
      Draw
    {% elif game.status== "F" and user == game.first_player %}
      You Won!
    {% elif game.status== "S" and user == game.second_player %}
      You Won!
    {% else %}
      You Lost.
    {% endif %}
    <span class='badge'>{{game.move_set_count}}</span></a>
{% empty %}
  <span class="list-group-item">No Games Available.</span>
{% endfor %}

为了全面披露，我通过 Pluralsight 上的 django 课程获得了大部分代码。不幸的是，他使用的是 django 1.5，而我使用的是 1.9，这不是第一次出现弃用/添加/更改问题，但这是我第一次无法在文档或此处找到答案.我很确定问题出在 {% if %} 标签中的模板逻辑中，因为如果我把它删掉，{% for %} 循环就会起作用，并且页面会显示正确的游戏列表。我意识到这篇文章很长，我只想说这里的任何/所有帮助将不胜感激。提前致谢！

Answer 1

Django 模板中的一些语句看起来像 Python，但 Django 实际上实现了自己的解析逻辑，它的工作方式与 Python 并不完全相同。在这种情况下，它无法解析未用空格分隔的== 条件与您正在比较的内容。所以game.status== 只需要game.status ==