Question

我一直避免这种方式太多次，我认为现在是时候寻求帮助了。

首先，我的项目相关部分的结构如下：

# models.py

class LocationsProvisioning(models.Model):
    user = models.CharField(max_length=200)
    dates = models.CharField(max_length=15)
    locations = models.CharField(max_length=200)
    goods = models.CharField(max_length=200)
    quantities = models.CharField(max_length=200)
    samples = models.CharField(max_length=200)

# forms.py

DateInput = partial(forms.DateInput, {
    'class': 'datepicker form-control',
    'name': 'dates'})

class ReportForm(forms.Form):
    start_date = forms.DateField(label="Start date", required=True,
                                 widget=DateInput(),
                                 initial=datetime.date.today() - datetime.timedelta(days=1))
    end_date = forms.DateField(label="End date", required=True,
                               widget=DateInput(),
                               initial=datetime.date.today())
    locations = forms.ModelMultipleChoiceField(label='Select some locations',
                                               queryset=LocationsModel.objects.all().order_by('name'), required=True,
                                               widget=forms.SelectMultiple(attrs={
                                                   'class': 'form-control',
                                                   'name': 'locations'
                                               }))

# views.py

def reports_view(request):
    form = ReportForm(request.POST or None)
    selected_locations = ''

    all_goods = GoodsModel.objects.all().order_by('name')

    if request.method == "POST":
        if form.is_valid():
            start_date = str(form.cleaned_data.get('start_date'))
            end_date = str(form.cleaned_data.get('end_date'))
            selected_locations = form.cleaned_data.get('locations')

        else:
            form = ReportForm()

    return render(request, 'admin/coffee_app/raport.html', {
        'form': form,
        'selected_locations': selected_locations,
        'all_goods': all_goods  # those will be the headers of the table
    })

到目前为止，我的模板中有一个表格，其中包含标题goods，第一列包含selected_locations。

html看起来像这样（我已删除了一些html标签以提高可读性）：

<form class="form-horizontal" method="post">
    {{ form.start_date.label_tag }}
    {{ form.end_date.label_tag }}
    {{ form.locations }}
    <button type="submit" class="btn my-btn" />
</form>

<table id="example" class="table table-striped table-bordered table-hover" cellspacing="0" width="100%">
    <thead>
    <tr>
        <th>Locations</th>
        {% for good in all_goods %}
            <th>{{ good }}</th>
        {% endfor %}
        <th>Samples</th>
    </tr>
    </thead>
    <tbody>
    {% for location in selected_locations %}
        <tr>
            <td>{{ location }}</td>
            <td>{{ here_I_should_have_quantities (some kind of map between the selected location and the `good` }}</td>   
            <td>{{ here_I_should_have_probes_for_selected_locations }}</td>
        </tr>
    {% endfor %}
    </tbody>
</table>

现在，我想做某种选择（LocationsProvisioning.objects.filter()）应该是这样的：

SELECT quantities, samples 
FROM LocationsProvisioning 
WHERE locations in selected_locations and dates BETWEEN start_date AND end_date

我知道我可以这样做：

LocationsProvisioning.objects.filter(dates__range=[start_date, end_date])

但我似乎无法找到办法：SELECT quantities, samples FROM LocationsProvisioning WHERE locations in selected_locations

对我来说看起来不可能的事情也只在需要时与数量/探针匹配：

            Good_1 Good_2 Good_3 Good_4 Samples
locality_1    23            2      7       3
locality_2           3      40     7       5     
locality_3     1     2                     3

更多详情：

每个selected_locality都有sample
selected_locality可能没有所有goods的值（请参见上表）

PS：我找不到更好的标题，所以随时编辑

Answer 1

日期应该是CharField还是DateField？尝试使用此查询集来获取数据。

LocationsProvisioning.objects
    .filter(locations__in=selected_locations, dates__range=(start_date, end_date))
    .values('quantities','samples')

在Django查询中选择特定数据，并在表格中映射结果（在th和td之间）

1 个答案: