django form validation error massage not showing. please help me out

[Mohammad Shahidullah]

models.py

class Position(models.Model):

    title = models.CharField(max_length=50)

    def __str__(self):

        return self.title

class Department(models.Model):

    title = models.CharField(max_length=50)

    def __str__(self):

        return self.title

class Employee(models.Model):

    fullname = models.CharField(max_length=100)

    emp_code = models.CharField(max_length=6)

    mobile= models.CharField(max_length=11)

    email = models.EmailField(max_length=25)

    position= models.ForeignKey(Position,on_delete=models.CASCADE)

    Department = models.ForeignKey(Department, on_delete=models.CASCADE)

    password_first = models.CharField(max_length=25)

    password_again = models.CharField(max_length=25)

   

    def __str__ (self):

        return self.fullname

forms.py

User = get_user_model()

class EmployeeForm(forms.ModelForm):

    class Meta:

        model = Employee

        fields = ('fullname','mobile','emp_code','position', 'Department','email', 'password_first', 'password_again')

        labels = {

            'fullname':'Full Name',

            'emp_code':'Employee Code',

            'password_first': 'Password',

            'password_again': 'Confirm Password',

        }

        widgets = {

            'password_first': forms.PasswordInput(),

            'password_again' : forms.PasswordInput(),

        }

    def __init__(self, *args, **kwargs):

        super(EmployeeForm,self).__init__(*args, **kwargs)

        self.fields['position'].empty_label = "Select"

        self.fields['Department'].empty_label = "Select"

   

    def clean_username(self):

        username = self.cleaned_data.get('emp_code')

        qs = User.objects.filter(username=username)

        if qs.exists():

            raise forms.ValidationError('username already exists')

        return username

   

    def clean(self):

        cleaned_data = self.cleaned_data

        password_first = self.cleaned_data.get('password_first')

        password_again = self.cleaned_data.get('password_again')

        if password_first and password_again and password_first != password_again:

            raise forms.ValidationError("Passwords din't match")

        return cleaned_data

   

    def clean_email(self):

        email_address = self.cleaned_data.get('email')

        qs = User.objects.filter(email=email_address)

        if qs.exists():

            raise forms.ValidationError("This email_id already registered")

        return email_address

views.py

def employee_form(request, id=0):

    if request.method == "GET":

        if id == 0:

            form = EmployeeForm()

        else:

            employee = Employee.objects.get(pk=id)

            form = EmployeeForm(instance=employee)

        return render(request, "users/employee_form.html", {'form': form})

    else:

        if id == 0:

            form = EmployeeForm(request.POST)

        else:

            employee = Employee.objects.get(pk=id)

            form = EmployeeForm(request.POST,instance= employee)

        if form.is_valid():

            form.save()

        return redirect('/list')

employee_form.html

{% block content %}

<div class="form-group">

<form action="" method="post" autocomplete="off">

    {% csrf_token %}

    {{form.fullname|as_crispy_field}}

    {{form.mobile|as_crispy_field}}

    {{form.email|as_crispy_field}}

   

    <div class="row">

        <div class="col-md-4">

            {{form.emp_code|as_crispy_field}}

        </div>

        <div class="col-md-4">

            {{form.position|as_crispy_field}}

        </div>

        <div class="col-md-4">

            {{form.Department|as_crispy_field}}

        </div>

    </div>

    <div class="row">

        <div class="col-md-6"  >

            {{form.password_first|as_crispy_field}}

        </div>

        <div class="col-md-6" >

            {{form.password_again|as_crispy_field}}

        </div>

    </div>

    <br><br><br>

    <div class="row">

        <div class="col-md-8">

            <button type="submit" class="btn btn-success btn-block btn-lg"><i class="fas fa-database"></i>

                Submit</button>

        </div>

        <div class="col-md-4">

            <a href="{% url 'employee_list' %}" class="btn btn-secondary btn-block btn-lg">

                <i class="fas fa-stream"></i> Back to list

            </a>

        </div>

    </div>

</form>

{% if form.error %}

        {% for field in form %}

            {% for error in field.error %}

                <p> {{ errors }} </p>

            {% endfor %}

        {% endfor %}

       

        {% for error in form.non_field_error %}

        <p> {{ error }} </p>

        {% endfor %}

{% endif %}

</div>

{% endblock content %}