Let's say i have a "register a new user" View and on this page, when the
user forgets to inform a password or a username, i show a message to him on
the same page saying "you forgot the password". The way i do this is by
doing this(on my View.py in a function called cadastrarprofessor):
nomeusuario = request.POST['usuario'] #username
nomesenha = request.POST['senha'] #password
nomeemail = request.POST['email'] #email
if not nomeusuario:
return render(request,'cadastro.html',{'cadastrorealizadocomsucesso':
False, 'error_message': "informe um usuário",
'nomeemailcadastro':nomeemail, 'nomesenhacadastro':nomesenha})
elif not nomesenha:
return render(request,'cadastro.html',{'cadastrorealizadocomsucesso':
False, 'error_message': "informe uma senha", 'nomeemailcadastro':nomeemail,
'nomeusuariocadastro':nomeusuario})
elif not nomeemail:
return render(request,'cadastro.html',{'cadastrorealizadocomsucesso':
False, 'error_message': "informe um email", 'nomesenhacadastro':nomesenha,
'nomeusuariocadastro':nomeusuario})
And my template for this page(cadastro.html) is like this:
<meta charset="utf-8"/>
<h1>Cadastro</h1>
<form action="{% url 'cadastrarprofessor' %}" method="post">
{% csrf_token %}
<label for="usuario">Usuário: </label>
{% if nomeusuariocadastro %}
<input id="usuario" type="text" name="usuario" value={{ nomeusuariocadastro
}}>
{% else %}
<input id="usuario" type="text" name="usuario" value=""/>
{% endif %}
... (DO THE SAME TO SENHA/PASSWORD AND EMAIL)
<input type="submit" value="Cadastrar"/>
</form>
<form action="{% url 'index' %}" method="post">
<input type="submit" value="Voltar"/>
{% csrf_token %}
</form>
{% if cadastrorealizadocomsucesso is True %}<b>cadastro realizado com
sucesso!</b>{% endif %}
{% if error_message %}<p><strong>{{ error_message }}</p></strong>{% endif %}
So, every time the user forgets to mention a username or email or password
in this screen, i use render to redirect the user to the same page but this
time displaying a error_message. Let's say he did forget to fill the
textfield with a username... he goes back to the same page and sees the
error message. After that, let's say everything is right and he finally
registers a new user, he sees "cadastro realizado com sucesso"(sucessfully
registered new user) and stays on the same page. But when he goes back a
page(pressing "back" on the browser), instead of going back to the page
before the cadastro.html, he goes back to the same page cadastro.html but
displaying the error message for the "you forgot to mention your username".
I don't want him to go back to the same page with error message, i want to
make him go back to my main menu.
Is there a better approach to display error messages on the same page
instead of using return render like this:
return render(request,'cadastro.html',{'cadastrorealizadocomsucesso': False,
'error_message': "informe um usuário", 'nomeemailcadastro':nomeemail,
'nomesenhacadastro':nomesenha})
?
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