HTMX 解析 JSON 响应问题

Question

我有一个页面将一些数据发布到 Django 后端并返回 JSON 响应。我在使用模板解析它时遇到问题。任何帮助，将不胜感激。提前谢谢你。

    <div class="card-body">
            <form>
            {% csrf_token %}
                <div class="input-group mb-3">
                    <label class="input-group-text">Command</label>
                    <select class="form-select" name="run_show_command" id="run_show_command">
                        <option selected disabled>Choose...</option>
                        <option value="{{ data.version.id }}:1">show ip interface brief</option>
                        <option value="{{ data.version.id }}:2">show interfaces description</option>
                        <option value="{{ data.version.id }}:3">show ip arp</option>
                        <option value="{{ data.version.id }}:4">show ip route</option>
                        <option value="{{ data.version.id }}:5">show ip cef</option>
                        <option value="{{ data.version.id }}:6">show version</option>
                    </select>
                    <button type="submit" class="btn btn-sm btn-success" hx-post="{% url 'inventory:device_run_command' %}" hx-target="#command_output" mustache-template="m_template" hx-indicator="#loader_bars">
                        <i class="fas fa-terminal"></i> Run
                    </button>
                </div>
            </form>
            <div class="d-flex justify-content-center" hx-ext="client-side-templates" id="command_output">
                <img id="loader_bars" class="htmx-indicator" alt="Loading..." src="{% static 'images/loaders/bars.svg' %}"/>
                <template id="m_template" type="text/mustache">
                    {% for data in dataset %}
                    {% for key, value in data.items %}
                        <li>{{ key }} {{ value }}</li>
                    {% endfor %}
                    {% endfor %}
                </template>
            </div>
        </div>

JSON:

 [{ "intf": "GigabitEthernet1", "ipaddr": "10.10.20.48", "status": "up", "proto": "up" }, { "intf": "GigabitEthernet2", "ipaddr": "unassigned", "status": "administratively down", "proto": "down" }, { "intf": "GigabitEthernet3", "ipaddr": "unassigned", "status": "administratively down", "proto": "down" }, { "intf": "Loopback1", "ipaddr": "10.10.10.100", "status": "up", "proto": "up" }, { "intf": "Loopback123", "ipaddr": "unassigned", "status": "up", "proto": "up" }, { "intf": "Loopback510", "ipaddr": "50.10.10.10", "status": "up", "proto": "up" }, { "intf": "Loopback511", "ipaddr": "51.10.10.10", "status": "up", "proto": "up" }, { "intf": "Loopback512", "ipaddr": "52.10.10.10", "status": "up", "proto": "up" }, { "intf": "Loopback666", "ipaddr": "6.6.6.6", "status": "up", "proto": "up" } ]

Answer 1

您不能像在 <template> 标记中那样在前端使用 Django 模板。 HTMX 支持 3 javascript 个模板库：mustache.js, handlebars and nunjucks。最接近Django的是nunjucks，它的灵感来自Jinja2，它的灵感来自Django Templates，所以会more-or-less熟悉

所以首先，不要忘记将 HTMX 扩展和 nunjucks 库添加到您的 JS 包中，或者直接添加到 HTML 基本模板中，例如：

<script src="https://unpkg.com/htmx.org@1.6.1"></script>
<script src="https://unpkg.com/htmx.org@1.6.1/dist/ext/client-side-templates.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/nunjucks/3.0.1/nunjucks.min.js"
   integrity="sha512-IIuR+Zp8wvP0dxNcSsRPoL7SXzP1kGmosDtcU7f6cPObZ9F5Ze/icFSRH/SqigP468jGwDm2XOE0/gSGm/cTBw=="
   crossorigin="anonymous" referrerpolicy="no-referrer"></script>

更新后的模板：

<div class="card-body">
  <form>
    {% csrf_token %}
    <div class="input-group mb-3" hx-ext="client-side-templates">
      <label class="input-group-text">Command</label>
      <select class="form-select" name="run_show_command" id="run_show_command">
        <option selected disabled>Choose...</option>
        <option value="{{ data.version.id }}:1">show ip interface brief</option>
        <option value="{{ data.version.id }}:2">show interfaces description</option>
        <option value="{{ data.version.id }}:3">show ip arp</option>
        <option value="{{ data.version.id }}:4">show ip route</option>
        <option value="{{ data.version.id }}:5">show ip cef</option>
        <option value="{{ data.version.id }}:6">show version</option>
      </select>
      <button type="submit" class="btn btn-sm btn-success" hx-post="{% url 'inventory:device_run_command' %}"
        hx-target="#command_output" nunjucks-template="m_template" hx-indicator="#loader_bars">
        <i class="fas fa-terminal"></i> Run
      </button>
    </div>
  </form>
  <div class="d-flex justify-content-center">
    <div id="command_output">
      <img id="loader_bars" class="htmx-indicator" alt="Loading..." src="{% static 'images/loaders/bars.svg' %}" />
    </div>
    <template id="m_template">
    {% verbatim %}
      <ul>
        {% for item in items %}
        {% for key, value in item %}
        <li>{{ key }} {{ value }}</li>
        {% endfor %}
        {% endfor %}
      </ul>
    {% endverbatim %}
    </template>
  </div>
</div>

请注意，我将 hx-ext 属性移到了按钮的父级 div 上，否则它将不起作用。 Nunjucks有相当similar syntax，但是比如我们不需要在嵌套循环中追加.items

编辑： 我之前错过了一个非常重要的细节：由于 nunjucks 和 DTL 的语法非常相似，我们必须将 nunjucks 模板嵌入到 {% verbatim %} 块中告诉 Django 忽略它。否则它会在后端由 Django 评估，而不是在前端由 nunjucks 评估。

此外，您的 JSON 文件中需要有一个顶级键，这将是第一个 for 循环中的键。

{
    "items": [
        {
            "intf": "GigabitEthernet1",
            "ipaddr": "10.10.20.48",
            "status": "up",
            "proto": "up"
        },
        {
            "intf": "GigabitEthernet2",
            "ipaddr": "unassigned",
            "status": "administratively down",
            "proto": "down"
        },
    ]
}

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