小贝子编程

如何在 Django 模板中显示三重嵌套字典值



我有一个由原始django查询和自定义排序算法生成的字典列表：

ordered_list = [{'qmaLevel': Decimal('1'), 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '12U x 600 x 650 Professional Rack ', 'qmaQuoteAssemblyID': 0, 'qmaPartID': 'RACK S9 ', 'quantity': Decimal('1.00000'), 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '. ', 'qmaQuoteAssemblyID': 1, 'qmaPartID': 'COLOUR ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('3'), 'indent': '________', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': 'Colour: Mannex Suede ', 'qmaQuoteAssemblyID': 21, 'qmaPartID': '800-560192 ', 'quantity': 1.0, 'qmaParentAssemblyID': 1}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '. ', 'qmaQuoteAssemblyID': 2, 'qmaPartID': 'FRAME ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('3'), 'indent': '________', 'materials': {1: {'qmmPartID': '128114 ', 'qmmPartShortDescription': '1.30;300;200;Black/White;Acrylic;Label; ', 'imrWeight': Decimal('0.00000')}, 2: {'qmmPartID': '800-560271 ', 'qmmPartShortDescription': 'Rivet;Alum;Truss;4.0;8.7; ', 'imrWeight': Decimal('0.00149')}, 3: {'qmmPartID': '800-560350 ', 'qmmPartShortDescription': 'Key;Ring;20mm; ', 'imrWeight': Decimal('0.00000')}}, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': 'Label 19" Rack Container Commercial ', 'qmaQuoteAssemblyID': 22, 'qmaPartID': '1A000 ', 'quantity': 1.0, 'qmaParentAssemblyID': 2}, 
{'qmaLevel': Decimal('3'), 'indent': '________', 'materials': {1: {'qmmPartID': '800-560008 ', 'qmmPartShortDescription': 'Colour;Powdercoat;General;Production Use ', 'imrWeight': Decimal('1.00000')}, 2: {'qmmPartID': '124632 ', 'qmmPartShortDescription': '1.90;M2;ZAN; ', 'imrWeight': Decimal('14.91500')}}, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': 'Frame Top x 600 x 650 Typ 0P ', 'qmaQuoteAssemblyID': 23, 'qmaPartID': '0R000P ', 'quantity': 1.0, 'qmaParentAssemblyID': 2}, 
{'qmaLevel': Decimal('3'), 'indent': '________', 'materials': {1: {'qmmPartID': '124632 ', 'qmmPartShortDescription': '1.90;M2;ZAN; ', 'imrWeight': Decimal('14.91500')}, 2: {'qmmPartID': '800-560008 ', 'qmmPartShortDescription': 'Colour;Powdercoat;General;Production Use ', 'imrWeight': Decimal('1.00000')}}, 'qmaQuantityPerParent': Decimal('4.00000'), 'qmaPartShortDescription': 'Frame Vertical 12U H2 Type 1 ', 'qmaQuoteAssemblyID': 24, 'qmaPartID': '0S0221 ', 'quantity': 4.0, 'qmaParentAssemblyID': 2}, 
{'qmaLevel': Decimal('3'), 'indent': '________', 'materials': {1: {'qmmPartID': '800-560008 ', 'qmmPartShortDescription': 'Colour;Powdercoat;General;Production Use ', 'imrWeight': Decimal('1.00000')}, 2: {'qmmPartID': '124632 ', 'qmmPartShortDescription': '1.90;M2;ZAN; ', 'imrWeight': Decimal('14.91500')}}, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': 'Frame Bottom x 600 x 650 Type 0P ', 'qmaQuoteAssemblyID': 25, 'qmaPartID': '0T000P ', 'quantity': 1.0, 'qmaParentAssemblyID': 2}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': {1: {'qmmPartID': '800-560008 ', 'qmmPartShortDescription': 'Colour;Powdercoat;General;Production Use ', 'imrWeight': Decimal('1.00000')}}, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '. ', 'qmaQuoteAssemblyID': 3, 'qmaPartID': 'MOUNTING ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('3'), 'indent': '________', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': 'Base Pro. Levelling Feet + Mount Plate Kit GA ', 'qmaQuoteAssemblyID': 27, 'qmaPartID': '0E220 ', 'quantity': 1.0, 'qmaParentAssemblyID': 3}, 
{'qmaLevel': Decimal('4'), 'indent': '____________', 'materials': {1: {'qmmPartID': '800-560349 ', 'qmmPartShortDescription': 'M10;40;Levelling Foot Adjust Screw; ', 'imrWeight': Decimal('0.03081')}, 2: {'qmmPartID': '800-560268 ', 'qmmPartShortDescription': 'M16;Zinc;Hex;Locknut ', 'imrWeight': Decimal('0.00000')}, 3: {'qmmPartID': '800-560097 ', 'qmmPartShortDescription': 'M05;Zinc;Flange;Nut; ', 'imrWeight': Decimal('0.00164')}, 4: {'qmmPartID': '800-560266 ', 'qmmPartShortDescription': 'M10;Zinc;Hex;CLS8 ', 'imrWeight': Decimal('0.00905')}, 5: {'qmmPartID': '128263 ', 'qmmPartShortDescription': 'M16;M10;M24;Mild;Hex;Threaded;Bush;22mm; ', 'imrWeight': Decimal('0.00000')}, 6: {'qmmPartID': '800-560098 ', 'qmmPartShortDescription': 'M05;15;Steel ', 'imrWeight': Decimal('0.00000')}}, 'qmaQuantityPerParent': Decimal('4.00000'), 'qmaPartShortDescription': 'Levelling Feet ', 'qmaQuoteAssemblyID': 39, 'qmaPartID': '800-250215 ', 'quantity': 4.0, 'qmaParentAssemblyID': 27}, 
{'qmaLevel': Decimal('5'), 'indent': '________________', 'materials': {1: {'qmmPartID': '800-560098 ', 'qmmPartShortDescription': 'M05;15;Steel ', 'imrWeight': Decimal('0.00000')}, 2: {'qmmPartID': '124632 ', 'qmmPartShortDescription': '1.90;M2;ZAN; ', 'imrWeight': Decimal('14.91500')}}, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': ';;;;;Leveling;Foot;Plate; ', 'qmaQuoteAssemblyID': 40, 'qmaPartID': '800-250137 ', 'quantity': 4.0, 'qmaParentAssemblyID': 39}, 
{'qmaLevel': Decimal('3'), 'indent': '________', 'materials': {1: {'qmmPartID': '124887 ', 'qmmPartShortDescription': 'Rivet;Steel;Dome;4.8;1.6-6.4; ', 'imrWeight': Decimal('0.00000')}, 2: {'qmmPartID': '800-560013 ', 'qmmPartShortDescription': 'M06;Nutsert;Open;Large;Flange; ', 'imrWeight': Decimal('0.00000')}, 3: {'qmmPartID': '800-560014 ', 'qmmPartShortDescription': 'M06;16;Zinc;Phillips;Hex;Serrated ', 'imrWeight': Decimal('0.00502')}}, 'qmaQuantityPerParent': Decimal('4.00000'), 'qmaPartShortDescription': 'Gusset Mount Rail 12U x 600 ', 'qmaQuoteAssemblyID': 28, 'qmaPartID': '03020D0 ', 'quantity': 4.0, 'qmaParentAssemblyID': 3}, 
{'qmaLevel': Decimal('4'), 'indent': '____________', 'materials': {1: {'qmmPartID': '124633 ', 'qmmPartShortDescription': '1.50;M2;ZAN; ', 'imrWeight': Decimal('11.77500')}, 2: {'qmmPartID': '800-560008 ', 'qmmPartShortDescription': 'Colour;Powdercoat;General;Production Use ', 'imrWeight': Decimal('1.00000')}}, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': 'Mount Rail Gusset 12U Universal ', 'qmaQuoteAssemblyID': 41, 'qmaPartID': '127040 ', 'quantity': 4.0, 'qmaParentAssemblyID': 28}, 
{'qmaLevel': Decimal('4'), 'indent': '____________', 'materials': {1: {'qmmPartID': '124632 ', 'qmmPartShortDescription': '1.90;M2;ZAN; ', 'imrWeight': Decimal('14.91500')}, 2: {'qmmPartID': '800-560008 ', 'qmmPartShortDescription': 'Colour;Powdercoat;General;Production Use ', 'imrWeight': Decimal('1.00000')}}, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '12U;0600;;;C;Mount;Rail; ', 'qmaQuoteAssemblyID': 42, 'qmaPartID': '127014 ', 'quantity': 4.0, 'qmaParentAssemblyID': 28}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '. ', 'qmaQuoteAssemblyID': 4, 'qmaPartID': 'FRONT DOOR ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('3'), 'indent': '________', 'materials': {1: {'qmmPartID': '800-560008 ', 'qmmPartShortDescription': 'Colour;Powdercoat;General;Production Use ', 'imrWeight': Decimal('1.00000')}}, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': 'No Door Required ', 'qmaQuoteAssemblyID': 29, 'qmaPartID': 'NO DOOR ', 'quantity': 1.0, 'qmaParentAssemblyID': 4}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '. ', 'qmaQuoteAssemblyID': 5, 'qmaPartID': 'REAR DOOR ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('3'), 'indent': '________', 'materials': {1: {'qmmPartID': '800-560008 ', 'qmmPartShortDescription': 'Colour;Powdercoat;General;Production Use ', 'imrWeight': Decimal('1.00000')}}, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': 'No Door Required ', 'qmaQuoteAssemblyID': 34, 'qmaPartID': 'NO DOOR ', 'quantity': 1.0, 'qmaParentAssemblyID': 5}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '(when viewed from front of rack) ', 'qmaQuoteAssemblyID': 6, 'qmaPartID': 'LEFT SIDE PANEL ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '(when viewed from front of rack) ', 'qmaQuoteAssemblyID': 7, 'qmaPartID': 'RIGHT SIDE PANEL ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '. ', 'qmaQuoteAssemblyID': 8, 'qmaPartID': 'ACCESSORIES ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '. ', 'qmaQuoteAssemblyID': 9, 'qmaPartID': 'PDU ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '. ', 'qmaQuoteAssemblyID': 10, 'qmaPartID': 'FRONT VCM ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '. ', 'qmaQuoteAssemblyID': 11, 'qmaPartID': 'REAR VCM ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}, 
{'qmaLevel': Decimal('2'), 'indent': '____', 'materials': None, 'qmaQuantityPerParent': Decimal('1.00000'), 'qmaPartShortDescription': '. ', 'qmaQuoteAssemblyID': 12, 'qmaPartID': 'PACKAGING ', 'quantity': 1.0, 'qmaParentAssemblyID': 0}]

每个字典都有一个名为 materials 的嵌套字典，每个materials字典都有一些嵌套的字典，其键qmmQuoteMaterialID在此示例中为 1 到 6，但可以根据查询具有从 1 到 n 的任何数字。例：

{'qmaLevel': Decimal('4'), 'indent': '____________', 'materials': {1: {'qmmPartID': '800-560349 ', 'qmmPartShortDescription': 'M10;40;Levelling Foot Adjust Screw; ', 'imrWeight': Decimal('0.03081')}, 2: {'qmmPartID': '800-560268 ', 'qmmPartShortDescription': 'M16;Zinc;Hex;Locknut ', 'imrWeight': Decimal('0.00000')}, 3: {'qmmPartID': '800-560097 ', 'qmmPartShortDescription': 'M05;Zinc;Flange;Nut; ', 'imrWeight': Decimal('0.00164')}, 4: {'qmmPartID': '800-560266 ', 'qmmPartShortDescription': 'M10;Zinc;Hex;CLS8 ', 'imrWeight': Decimal('0.00905')}, 5: {'qmmPartID': '128263 ', 'qmmPartShortDescription': 'M16;M10;M24;Mild;Hex;Threaded;Bush;22mm; ', 'imrWeight': Decimal('0.00000')}, 6: {'qmmPartID': '800-560098 ', 'qmmPartShortDescription': 'M05;15;Steel ', 'imrWeight': Decimal('0.00000')}}, 'qmaQuantityPerParent': Decimal('4.00000'), 'qmaPartShortDescription': 'Levelling Feet ', 'qmaQuoteAssemblyID': 39, 'qmaPartID': '800-250215 ', 'quantity': 4.0, 'qmaParentAssemblyID': 27},

我需要在 Django 模板中显示qmmQuoteMaterialID字典中的内容，但不确定如何去做。这是我当前的模板：

{% for qmaQuoteAssemblyID in ordered_list %}
  <tr>
    <td class="text-center text-muted">{{ qmaQuoteAssemblyID.qmaLevel }}</td>
    <td>
      {% autoescape off %}
        <span style="color:white;">{{ qmaQuoteAssemblyID.indent|escape }}</span>
      {% endautoescape %}
      {{ qmaQuoteAssemblyID.qmaPartID }}
    </td>
    <td class="text-center">{{ qmaQuoteAssemblyID.qmaQuoteAssemblyID }}</td>
    <td class="text-center">{{ qmaQuoteAssemblyID.qmaParentAssemblyID }}</td>
    <td>{{ qmaQuoteAssemblyID.qmaPartShortDescription }}</td>
    <td class="text-center">{{ qmaQuoteAssemblyID.qmaQuantityPerParent|floatformat:"2" }}</td>
    <td class="text-center">{{ qmaQuoteAssemblyID.quantity|floatformat:"2"}}</td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    {% if qmaQuoteAssemblyID.materials != None %}
      {% for qmmQuoteMaterialID in qmaQuoteAssemblyID.materials %}
        <tr>
          <td></td>
          <td></td>
          <td></td>
          <td></td>
          <td></td>
          <td></td>
          <td></td>
          <td>{{ qmmQuoteMaterialID.qmmQuoteMaterialID }}</td>
          <td>{{ qmmQuoteMaterialID.qmmPartID }}</td>
          <td>{{ qmmQuoteMaterialID.qmmPartShortDescription }}</td>
          <td>{{ qmmQuoteMaterialID.imrWeight }}</td>
        </tr>
      {% endfor %}
    {% endif %}
  </tr>
{% endfor %}

目前，上述模板正在为父项分配正确数量的行数，但是它没有显示任何内容，因为我似乎没有正确调用相关数据。

好的，您似乎忘记了访问有序列表的小细节。默认情况下，不提供任何访问字典的方法，只需返回密钥即可。你需要做什么，迭代它的项：

{% if qmaQuoteAssemblyID.materials != None %}
  {% for key, qmmQuoteMaterialID in qmaQuoteAssemblyID.materials.items %}
    <tr>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
      <td>{{ qmmQuoteMaterialID.qmmQuoteMaterialID }}</td>
      <td>{{ qmmQuoteMaterialID.qmmPartID }}</td>
      <td>{{ qmmQuoteMaterialID.qmmPartShortDescription }}</td>
      <td>{{ qmmQuoteMaterialID.imrWeight }}</td>
    </tr>

在这里，您可以阅读有关dict数据结构，其方法和循环技术的更多信息。

https://docs.python.org/3.4/tutorial/datastructures.html#dictionaries https://docs.python.org/3.4/library/stdtypes.html#typesmapping

Django 模板似乎无法使用变量来查找这样的字典。我能够使用自定义过滤器创建所需的行为。在此处阅读官方文档

例：

from django.template.defaulttags import register

@register.filter
def get_item(dictionary, key):
    return dictionary.get(key)

在<your_app_name>/templatetags/<awesome_name>.py

在模板中：

{% load get_item %}
{% for level1 in my_dict %}
    {{ my_dict|get_item:level1 }}
    {% for level2 in my_dict|get_item:level1 %}
        {{ my_dict|get_item:level1|get_item:level2 }}
    {% endfor %} 
{% endfor %}

我没有尝试 level2。

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