我的Django网站上有一个页面，它根据存储在数据库中的信息显示了许多表格。
用于创建显示表格的页面的视图定义为：
def current_budget(request, budget_id):
""" View the active provisional/deposit budget """
budget = Budget.objects.select_related('project', 'project__budget_overview').prefetch_related('project__projectroom_set', 'project__budget_versions', 'budget_items').get(id=budget_id)
project = budget.project
# project.projectroom_set.filter(budgetitem__isnull=True, cciitem__isnull=True).delete()
if project.budget_overview.deposit_budget_saved: return HttpResponseRedirect(reverse('costing:combined_budget', args=[project.id]))
#This is now done in the costing_home view
# if not budget:
# Budget.objects.create(project=project, current_marker=1)
if not budget.budget_items.exists() and not project.budget_overview.deposit_budget_saved: init_budget(budget) # Create initial BudgetItem objects as standard
budget_items = budget.budget_items.select_related('budget', 'budget__project', 'project_room', 'project_room__room', 'room')#.order_by('build_type', 'build_type_detail', 'project_room', 'order') # .exclude(build_type=None)
budget_items2 = None #budget.budget_items.filter(build_type=None).order_by('build_type_detail', 'project_room', 'room')
context = {
'project': project,
'budget': budget,
'offset1': -5,
'offset2': -4,
}
try: context['current_budget'] = project.budget_versions.get(current_marker=1) #For option name/date on top of pdfs
except ObjectDoesNotExist: pass
if request.GET.get('version') or project.budget_overview.deposit_budget_saved: #Make the fields all readonly
context['readonly'] = True
context['offset1'] = -7
if request.GET.get('report'): #Schedule of works report uses same data as current budget form
""" Client view of budget. IMPORTANT: Hidden items are not displayed here """
items_grouped = groupby(budget_items.filter(hidden_cost=False), lambda x: x.build_type)
grouped_items = [(x, list(y)) for x, y in items_grouped]
context['grouped_items'] = grouped_items
if request.GET.get('pdf'):
template = get_template('costing/report_schedule_of_works.html')
html = template.render(context)
file = open('test.pdf', "w+b")
pisaStatus = pisa.CreatePDF(html.encode('utf-8'), link_callback=fetch_resources, dest=file,
encoding='utf-8')
file.seek(0)
pdf = file.read()
file.close()
return HttpResponse(pdf, 'application/pdf')
else:
context['webview'] = 1
context['html'] = render_to_string('costing/report_schedule_of_works.html', context)
context['active_tab'] = '3'
return render(request, 'costing/reports_pre_deposit.html', context)
else:
if not context.get('readonly'):
context['skill_day_rate'] = skill_day_rate
context['labour_day_rate'] = labour_day_rate
# Dict with ProjectRoom ids and the total for the room
room_totals = {}
for project_room in project.projectroom_set.all():
room_totals[project_room.id] = sum(item.total_inc_profit for item in budget_items if item.project_room == project_room)
context['room_totals'] = room_totals
item_formset = BudgetItemFormset(queryset=budget_items, form_kwargs={'project': project})
item_form = item_formset.forms[0]
context['field_count'] = len(item_form.visible_fields())
context['ao_field_count'] = len(item_form.visible_fields())
room_choices = project.room_choices
context['formset'] = item_formset
context['widths'] = budget_item_column_widths #First column is add/delete options to allow for forloop count offset
context['options_width'] = options_width #First column is add/delete options to allow for forloop count offset
context['labour_rate'] = labour_day_rate
context['skill_rate'] = skill_day_rate
context['item_code_options'] = ItemCodeForm()
skill_total = int(budget_items.aggregate(Sum('skill_days'))['skill_days__sum'] or 0)
if budget_items2: labour_total = int(budget_items2.aggregate(Sum('labour_days'))['labour_days__sum'])
else: labour_total = 0
return render(request, 'costing/budget_current.html', context)
我现在想在这些表中添加一个“自定义”列，以允许用户输入自己的注释（即不会显示从数据库中检索到的数据，但是应该向每行添加信息）数据库保存时。）
我该怎么做？我原以为我会在视图（Python）中而不是在模板（HTML）中这样做，因为视图是构建表的地方吗？
修改
所以，我已经在models.py中为应用添加了额外字段：
class Deposit(models.Model):
""" Each Deposit is linked to a Payment, whose is_booking_deposit field = True """
project = models.OneToOneField('projects.Project', null=True, blank=True)
half_paid = models.DateField(null=True, blank=True)
date_received = models.DateField(null=True, blank=True)
amount_exc_vat = models.DecimalField(decimal_places=2, max_digits=12, null=True, blank=True)
invoice_raised = models.DateField(null=True, blank=True)
notes = models.TextField(null=True, blank=True)
# Create a column for 'custom notes' in the tables:
custom_notes = models.TextField(null=True, blank=True) #Add the column to table in tables.py
created = models.DateTimeField(auto_now_add=True)
modified = models.DateTimeField(auto_now=True)
payment = models.OneToOneField(Payment, null=True)
...
我在Deposit模型中添加的字段是custom_notes。
我还尝试将同一字段添加到BudgetItemTable()中的tables.py：
class BudgetItemTable(tables.Table):
# Add a column for 'custom notes' to the tables for current budget
custom_notes = tables.Column(accessor='self.custom_notes')
class Meta:
model = BudgetItem
attrs = {"class": "paleblue"}
exclude = ('id')
我已经python manage.py makemigrations＆amp; python manage.py migrate myApp，但是当我刷新浏览器再次查看此页面时，我的表的新列未显示 - 我是否需要以某种方式将其添加到视图中？我该怎么做？
修改
显示我要添加列的表的视图的HTML文件具有以下结构：
...
{% block page_options_style %}allow-footer{% endblock page_options_style %}
{% block page_options %}
...
{% block report %}
<div id='budget_form' class="col-12" data-pr="{{project.id}}" style="margin-bottom:7em;">
<form class="autosave_form formset num_refresh text-sm" data-view-url="{% url 'costing:save_items' budget.id %}">{% csrf_token %}
{{formset.management_form}}
<div>
<table ...>
<thead class=... >
<tr class=...>
...
<!-- code to get table headings here -->
<th style="width:{{options_width}}">Custom Notes</th>
<!-- I added the 'Custom Notes' heading myself -->
</tr>
</thead>
...
<tbody>
...
<tr id="item_{{forloop.counter}}" class="{% cycle 'odd' 'even' %}">
...
<!-- code add columns and populate rows here -->
<td>
<a class="delete" ... ></a>
<!-- I can see this column with the 'delete' values is the last column in the table on the webpage, so I want to manually add another column after it in the table- I tried doing this by adding the following tags: -->
</td>
<td>
<a class="custom_notes" type="text" value=""></a>
</td>
...
</tr>
</tr>
</tbody>
</table>
...
</tbody>
</table>
</div>
</form>
我尝试使用以下行添加“自定义备注”列：
<td>
<a class="custom_notes" type="text" value=""></a>
</td>
当我在浏览器中查看此页面时，我可以看到我添加的Custom Notes列标题，显示在表格上方，但它显示在表格结束的右侧（我预期）我添加到表格中的列，显示在它下面。）
我尝试添加的“自定义备注”的表格列并未在表格中显示...
这是为什么？如何将新列显示在网页上的表格中？我已将相应字段添加到model中的models.py，因此虽然此时此数据库中的任何项目都没有任何数据，但用户输入数据时在表格的这个字段中，有些地方可以将这些值存储在数据库的模型中......
修改
我设法将这个附加字段添加到表中，方法是将以下HTML添加到表中，就在</tr>内的最后两个</tbody></table>标记内：
<td>
<a class="custom_notes" type="text" value=""></a>
<input id="budget_notes" type="text" width="100" value="">
</td>
但由于某种原因，我添加的文本输入字段非常窄 - 在输入文本时，您一次看不到多个文本字符。我尝试使用width="100"指定字段的宽度，如上所示，但这似乎没有任何区别。如何强制此列中的单元格具有设置宽度？