1. Define model.py
The type of field defined in model is valid only when validated through a form, and the field types in the database are not exactly the same, as there is no IPAddress type in the database. If a field is not validated through a form, the user can enter any type of data on the front-end without error.
from Import Models class HV (models. Model): name=models. Charfield (max_length=100,unique=true,primary_key=True) IP=models. Genericipaddressfield () def__str__(self): return Self.name
2. Define froms.py
Modelform connects the model with the foreground form
Forms. The form is not connected to the back-end model, but is used to determine whether the foreground input is legitimate
fromDjangoImportForms fromDjango.formsImportModelform fromAptest.modelsImportHv,vm,test#Import the model you want to useclassHvform (modelform):classMeta:model=HV Fields= ['name','IP'] #Fields = ' __all__ ' #选择使用所有字段 #exclude = [' title '] #不适用某个字段
class Vmform (modelform): CPU# re-formats the CPU field, overwriting the type format defined in model. Custom error message, need to know the name of the specific error such as "requeired" These names can be found in the API class Meta: = vm '__all__'
3. Edit views.py
defAdd (Request):ifRequest.method = ='POST': #Print request. post[' Hvname '],request. post[' HVIP '] PrintRequest.method Form=Hvform (Request. POST)ifForm.is_valid ():#determine if the input data is legitimate #Print Form #print form.cleaned_data[' name '],form.cleaned_data[' IP ']FC =Form.cleaned_dataPrintEcx'name'],fc['IP'] Else: Err.append (form.errors)#Output error message Else: Form=Hvform () context={'Hour_offset': Hour_offset,'ls': LS,'Err': Err}returnRender (Request,'aptest/form.html', context)
4. Edit Template form.html
<!DOCTYPE HTML><HTML><Head> <title>ADD</title> <Linkrel= "stylesheet"href= "Http://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css"> <Scriptsrc= "Http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></Script> <Scriptsrc= "Http://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></Script></Head><Body><formclass= "Form-horizontal"role= "form"Action=""Method= "POST">{% Csrf_token%}<!--{{form.as_table}} - <!--If you use this method, you will need to render the form to the template in the view, otherwise open the page does not see the input box - <Divclass= "Form-group"> <label for= "Name1"class= "Col-sm-2 Control-label">Name</label> <Divclass= "Col-sm-10"> <inputtype= "text"class= "Form-control"ID= "Name1"name= "Name"value= "{{form.name}}"> <!--here value must be defined, and form cannot be rendered into the template. Form.name is the Form=hvform (request) in view. POST), does not define the Value,post data background form cannot receive - </Div> </Div> <Divclass= "Form-group"> <label for= "IP"class= "Col-sm-2 Control-label">Ip</label> <Divclass= "Col-sm-10"> <inputtype= "text"class= "Form-control"ID= "IP"name= "IP"value= "{{Form.ip}}"> </Div> </Div> <Divclass= "Form-group"> <Divclass= "Col-sm-offset-2 col-sm-10"> <Buttontype= "Submit"class= "Btn Btn-default">ADD</Button> </Div> </Div></form>{% If err%}<Pstyle= "color:red;">Please correct the error: {{err}} below. </P>{% endif%}</Body></HTML>
Access output:
When the form content is displayed in the template through {{form.as_table}}, Django automatically converts the foreign key field into a control of select, and selects a value from the drop-down box, such as:
context={'err': Err,'form': Form}return Render (Request,'aptest/current_datetime.html', context)Using modelform form Validation
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