我是
django的新手.我正在使用简单的ajax在课程选择的基础上动态更新选择字段学期.但在提交表单时我收到错误选择一个有效的选择.选择的选项不是可用选项之一.代码如下：
forms.py：
from django import forms from @R_502_349@back_form.models import course,section_info class loginForm(forms.Form): iquery1 = course.objects.values_list('course_name',flat = True) iquery1_choices = [('','----------')] + [(id,id) for id in iquery1] sem_choices = [('','----------')] course_name = forms.ChoiceField(iquery1_choices,required=True,widget=forms.Select()) semester = forms.ChoiceField(sem_choices,required= True,widget=forms.Select())
views.py：
def get_batch(request,c_id):
current_course = @R_502_349@back_form.models.course.objects.get(course_name=c_id)
batches = @R_502_349@back_form.models.batch.objects.all().filter(course_id=current_course)
no_of_sem = @R_502_349@back_form.models.course.objects.values_list('number_of_sem',flat=True).filter(course_id = current_course)
no_of_sem = int(no_of_sem[0])
batch_dict = {}
for batch in batches:
batch_dict[batch.batch_id] = batch.batch_id
sem = {}
sem[no_of_sem] = no_of_sem
data = [batch_dict,no_of_sem]
return HttpResponse(json.dumps(data))
loginForm.html：
<form action="" method="post">
<table>
{{ form.as_table }}
</table>
{% csrf_token%}
<input type="submit" value="Submit">
</form>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$('#id_course_name').change(function() {
request_url = 'login/get_batch/' + c_id + '/';
$.ajax({
url: request_url,success: function(data){
data = $.parseJSON(data);
$('#id_semester').html('<option selected="' + "selected" + '">' + '' +'</option>');
for(var i = 1; i<=data[1]; i++) //data[1] contains no of sem
$('#id_semester').append('<option value="' + i + '">' + i +'</option>');
},errors: function(e) {
alert(e);
}
})
})
请帮帮我.
