我试图在用户重新访问该页面时将其选择的项目显示在FilteredSelectMultiple选择框中。我尝试通过javascript附加选项，但没有帮助。我已经看到了关于如何也预填充相同小部件的stackoverflow问题，但这似乎仅适用于管理员方面。我的FilteredSelectMultiple小部件位于用户端。
这是我使用的代码：
models.py：
class Roles(models.Model):
role_id = models.AutoField(primary_key=True)
role_name = models.CharField(max_length=18,
unique=True,
validators=[letters_only])
class Staffs(models.Model):
staff_id = models.AutoField(primary_key=True)
admission_number = models.CharField(max_length=5,
unique=True,
help_text="Enter 5 digits",
validators=[numeric_only, MinLengthValidator(5)])
staff_full_name = models.CharField(max_length=70,
help_text="Enter staff's full name",
validators=[letters_only])
created_by = UserForeignKey(auto_user_add=True,
editable=False,
related_name="staff_created_by",
db_column="created_by")
created_at = models.DateTimeField(auto_now_add=True,
editable=False)
updated_by = UserForeignKey(auto_user=True,
editable=False,
related_name="staff_updated_by",
db_column="updated_by")
updated_at = models.DateTimeField(auto_now=True,
editable=False)
roles = models.ManyToManyField(Roles, through='Designations')
class Designations(models.Model):
designation_id = models.AutoField(primary_key=True)
curriculum = models.ForeignKey(Curricula, on_delete=models.CASCADE)
role = models.ForeignKey(Roles, on_delete=models.CASCADE)
staff = models.ForeignKey(Staffs, on_delete=models.CASCADE)
forms.py：
class ModuleCoordinatorForm(forms.ModelForm):
class Media:
css = {
'all': ('admin/css/responsive.css', 'admin/css/base.css', 'admin/css/widgets.css',)
}
js = ('/admin/jsi18n',)
class Meta:
model = Designations
fields = ['module_coordinator', 'role_mc']
module_coordinator = forms.ModelMultipleChoiceField(queryset=Staffs.objects.all(),
widget=FilteredSelectMultiple("Module Coordinator",
is_stacked=False),
required=False,
label="")
role_mc = forms.ModelChoiceField(queryset=Roles.objects.all(), widget=forms.HiddenInput,
initial=Roles.objects.get(role_name='Module Coordinator'))
views.py：
def module_coordinator(request):
c = request.GET.get('curriculum')
c = int(c)
mc = request.GET.get('mc')
staffs = request.GET.get('staffs')
staffs = staffs.replace('[', '')
staffs = staffs.replace(']', '')
staffs = staffs.split(",")
staffs = [i.replace('"', '') for i in staffs]
staffs = [ast.literal_eval(i) for i in staffs]
# code for saving into db
if request.is_ajax:
for staff in staffs:
if Designations.objects.filter(curriculum_id=c, role_id=mc, staff_id=staff).exists():
pass
else:
Designations(curriculum_id=c, role_id=mc, staff_id=staff).save()
data = {
'result': 'Module Coordinators Assigned Successfully'
}
return JsonResponse(data)
class DesignationsView(TemplateView):
template_name = 'curricula/designations.html'
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
context['mc_form'] = ModuleCoordinatorForm(self.request.GET or None)
context['curriculum'] = Curricula.objects.get(
course_period__course__course_abbreviation=self.kwargs.get('course_abbr'),
module_period__module__module_abbreviation=self.kwargs.get('module_abbr'),
course_period__period__academic_year=self.kwargs.get('year'),
course_period__period__semester=self.kwargs.get('semester'),
stage=self.kwargs.get('stage')).pk
mc_qs = Designations.objects.filter(role__role_name='Module Coordinator',
curriculum__course_period__course__course_abbreviation=self.kwargs.get(
'course_abbr'),
curriculum__module_period__module__module_abbreviation=self.kwargs.get(
'module_abbr'),
curriculum__course_period__period__academic_year=self.kwargs.get('year'),
curriculum__course_period__period__semester=self.kwargs.get('semester'),
curriculum__stage=self.kwargs.get('stage')
).values_list('staff', flat=True)
chosen_mcs_name = []
chosen_mcs_id = []
for mc in mc_qs:
chosen_mc = Staffs.objects.get(pk=mc)
chosen_mcs_name.append(chosen_mc)
chosen_mcs_id.append(mc)
# print(chosen_mcs_name)
print(chosen_mcs_id)
# chosen_mcs_name_json = json.dumps(chosen_mcs_name)
# print(chosen_mcs_name_json)
context['chosen_mc_name'] = chosen_mcs_name
context['chosen_mc_value'] = chosen_mcs_id
return context
urls.py：
path('courses/<str:course_abbr>/<str:module_abbr>/<int:year>/<int:semester>/<int:stage>/designations',
views.DesignationsView.as_view(), name='designations'),
path('ajax/module_coordinator/', views.module_coordinator, name="module_coordinator")
designations.html：
{% extends "main_template.html" %}
{% load static %}
{% block title %}Designations{% endblock %}
{% block css %}
<style>
hr {
display: block;
margin: 0.5em auto;
border: 1px inset;
}
</style>
{% endblock %}
{% block content %}
{% include 'navbar_architect.html' %}
{{ mc_form.media }}
<div id="content" class="colM">
<div id="content-main">
<h2>Assign Module Coordinator(s)</h2>
<form enctype="multipart/form-data" method="post" novalidate>
{% csrf_token %}
{{ mc_form.non_field_errors }}
<input type="hidden" value="{{ curriculum }}" id="id_curriculum_mc">
{{ mc_form.role_mc }}
<div>
<fieldset class="module aligned">
<div class="form-row">
<div>
<div class="fieldWrapper related-widget-wrapper">
<div class="selector">
{{ mc_form.module_coordinator.errors }}
{{ mc_form.module_coordinator }}
</div>
</div>
</div>
</div>
<button type="button" class="btn btn-primary float-right" id="mc_btn">Assign</button>
</fieldset>
</div>
</form>
<hr>
</div>
</div>
{% endblock %}
{% block javascript %}
<script>
$(document).ready(() => {
let value = "{{ chosen_mc_value }}";
value = value.replace('[', '');
value = value.replace(']', '');
value = value.split(",").map(Number);
console.log(value);
let name = "{{ chosen_mc_name }}".replace(/<Staffs: /g, '');
name = name.replace(/>/g, '');
name = name.replace('[', '');
name = name.replace(']', '');
name = name.split(", ");
console.log(name);
for (let i = 0; i < value.length; i++) {
$("#id_module_coordinator_to").append(`<option value="${value[i]}">${name[i]}</option>`); //doesn't work
}
$('#mc_btn').click(function () {
$('#id_module_coordinator_to option').prop('selected', true);
let curriculum = $("#id_curriculum_mc").val();
let mc = $("#id_role_mc").val();
let staffs = $("#id_module_coordinator_to").val();
if ($("#id_module_coordinator_to").has('option').length === 0) {
return false;
}
$.ajax({
url: '{% url 'module_coordinator' %}',
data: {
'curriculum': curriculum,
'mc': mc,
'staffs': JSON.stringify(staffs)
},
dataType: 'json',
success: function (data) {
swal({
title: data.result,
toast: true,
position: 'top-end',
type: 'success',
showConfirmButton: false,
allowEscapeKey: false,
allowOutsideClick: false,
backdrop: false,
timer: 1500,
})
},
error: function () {
swal({
title: "Unable to assign",
toast: true,
position: 'top-end',
type: 'error',
showConfirmButton: false,
allowEscapeKey: false,
allowOutsideClick: false,
backdrop: false,
timer: 1500,
})
}
});
});
});
</script>
{% endblock %}
注意：swal是一个Javascript警报通知库
答案 0 :(得分：0)
尝试使用表单
class ModuleCoordinatorForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
super(ModuleCoordinatorForm, self).__init__(*args, **kwargs)
if self.instance.pk:
self.fields['module_coordinator'].initial = self.instance.staff.all()
self.fields['role_mc'].initial = self.instance.role.all()
或视图中的
def edit_designations(request, id_designation):
if request.method == 'GET':
designation = get_object_or_404(Designations, pk=id_designation)
form = ModuleCoordinatorForm(instance=designation)
form.fields['module_coordinator'].initial = form.instance.staff.all()
form.fields['role_mc'].initial = form.instance.role.all()
return render(request, 'designation.html', {'form': form})