谁能给一个基本的例子,如何在django中使用jQuery实现相互依赖的下拉菜单?我试过了,但是我只得到一个下拉菜单。
Models.py
def get_photo_storage_path(photo_obj, filename):
random_string = ''.join(random.choice(string.ascii_uppercase + string.digits) for x in range(10))
storage_path = 'img/profile/' + random_string + '_' + filename
return storage_path
class CompanyMake(models.Model):
company_name = models.CharField(max_length = 100)
def __unicode__(self):
return self.company_name
class MakeModel(models.Model):
company = models.ForeignKey(CompanyMake)
model_name = models.CharField(max_length = 100)
def __unicode__(self):
return self.model_name
class ModelParts(models.Model):
company = models.ForeignKey(CompanyMake)
model = models.ForeignKey(MakeModel)
part_name = models.CharField(max_length = 100)
def __unicode__(self):
return self.part_name
class ModelYear(models.Model):
company = models.ForeignKey(CompanyMake)
model = models.ForeignKey(MakeModel)
year_value = models.IntegerField()
class UserProfile(models.Model):
user = models.OneToOneField(User,primary_key=True)
#image = models.ImageField(upload_to=get_photo_storage_path, null = True, blank=True)
part = models.ForeignKey(ModelParts,null = True, blank=True)
phone_number = models.CharField( max_length = 10,verbose_name="Mobile Number 10 digits",null = True, blank=True, default=None)
views.py是
def home(request):
cm = CompanyMake.objects.all()
for a in cm:
print a
mm = a.makemodel_set.all()
for b in mm:
print b
mp = b.modelparts_set.all()
for c in mp:
print c
my = ModelYear.objects.all()
print my
return render(request,'choice.html',{'cm':cm,'mm':mm, 'mp':mp, 'my':my})
forms.py是
class UserProfileForm(forms.ModelForm):
class Meta:
model = UserProfile
exclude=('user')
choice.html是
<select name="car">
{% for car in cm %}
<option value="{{car.key}}" selected="selected">{{car.company_name}}</option>
{% endfor %}
</select>
<br/>
<select name="car">
{% for model in mm %}
<option value="{{model.key}}" selected="selected">{{model.model_name}}</option>
{% endfor %}
</select>
在这里,我试图得到汽车模型和零件的相互依赖下拉。
最简单的方法是通过ajax调用第一个下拉菜单的更改事件。
把你的choice.html改成:
<select id = "selectbox1">
<option>Please Select Car Company</option>
{% for car in cm %}
<option value = "{{car.id}}"> {{car.company_name}} </option>
{% endfor %}
</select>
<select id = "selectbox2">
<option>Select Car Company First</option>
</select>
现在改变selectbox1
的选项,你必须得到selectbox2
选项的值(使用ajax),并把它们放在selectbox2
的html
在Javascript中(假设你使用Jquery):
$('#selectbox1').on("change", function(){
$.get("fetch_options2/"+$('#selectbox1').val(),
function (data){
$('#selectbox2').html(data);
}
, "html")
});
For server side:
在urls . py:url(r'fetch_options2/([0-9]+)$', 'fetch_options2', name='fetch_options2'),
在views.py: def fetch_options2(request, car_company_id):
opt2_html = ""
try:
company = CompanyMake.objects.get(pk = car_company_id)
make_models = company.makemodel_set.all()
for model in make_models:
opt2_html += "<option value='"+str(model.id)+"'>"+model.model_name+"</option>"
except:
write_exception("Error in fetching options 2")
return HttpResponse(opt2_html)
就是这样。如果你有任何问题,请告诉我。