如何让用户登录django

Question

I made my login in the application. Then I go to the screen that list all the users in my database. When I select an especified user I lost my user that is logged. So, how can I keep my user in all the application?

My views.py that list all the users. In this time, the url shows my user ( http://localhost:8000/os/acesso/consultausuario/9 )

def acesso_consultausuario(request, id=None):

    instance = get_object_or_404(usuario, id=id)

    queryset = usuario.objects.all().order_by('dat_criacao_usuario')
    instancia_usuario_filter = usuariofilter(request.GET, queryset=queryset)

    table = usuariotable(instancia_usuario_filter.qs)

    RequestConfig(request, paginate={'per_page': 25}).configure(table)

    paginator = Paginator(instancia_usuario_filter.qs, 5)
    page = request.GET.get('page')

    try:
        response = paginator.page(page)
    except PageNotAnInteger:
        # if page is not an integer, deliver first page
        response = paginator.page(1)
    except EmptyPage:
        # if page is out of range, deliver last pages of results
        response = paginator.page(paginator.num_pages)

     context = {
        "instance": instance,
        "filter": instancia_usuario_filter,
        "response": response,
        "table": table,
    }
    return render(request, 'consulta/consulta_usuario.html', context)


# Show an especified user that I selected before.
def acesso_consultausuariodetalhe(request, id=None):

    # Instância do usuário que foi selecionado na consulta
    instance = get_object_or_404(usuario, id=id)

    form = statususuarioForm(request.POST or None)

    if form.is_valid():  # All validation rules pass

        instance_status = form.save(commit=False)
        var_status = form.cleaned_data['statususuario']
        instance_status = statususuario.objects.get(desc_statususuario=var_status)


        # Salva o status atual na tabela logstatususuario
        instance_log = logstatususuario.objects.create(usuario = instance,
                                                        statususuario = instance_status)
        instance_log.save()

        # Seleciona o grupo de acesso
        #var_grupo = form.cleaned_data['grupo']
        #instance_grupo = grupo.objects.get(desc_grupo=var_grupo)

        # Atualiza o usuário com o novo status
        instance.statususuario = instance_status
        #instance.grupo = instance_grupo
        instance.save()

    context = {
        "instance": instance,
        "form": form,
    }

    return render(request, 'consultadetalhe/consulta_usuariodetalhe.html', context)

My filters.py

    class usuariofilter(django_filters.FilterSet):

        dat_criacao_usuario = django_filters.DateFromToRangeFilter()

        class Meta:
            model = usuario
            fields = ['id', 'dat_criacao_usuario', 'nom_usuario', 'empresa', 'grupo', 'statususuario']

My tables.py

    class usuariotable(tables.Table):

        id = tables.Column(verbose_name='ID', attrs={"td": {"align": "left"}})
        dat_criacao_usuario = tables.Column(verbose_name='Data Cadastro'
                                    ,attrs={"td": {"align": "left"}})
        nom_usuario = tables.Column(verbose_name='Nome'
                                      ,attrs={"td": {"align": "left"}})
        empresa = tables.Column(verbose_name='Empresa'
                                      ,attrs={"td": {"align": "left"}})
        grupo = tables.Column(verbose_name='Grupo'
                                      ,attrs={"td": {"align": "left"}})
        statususuario = tables.Column(verbose_name='Status'
                                      ,attrs={"td": {"align": "left"}})
        ver = tables.TemplateColumn('<a href={% url "acesso_consultausuariodetalhe" record.id %} style="color:#e26c2c">Ver</a>',
                                    verbose_name = '', )


        def __init__(self, *args, vb_statusservico="",**kwargs):  #will get the c1_name from where the the class will be called.
            super().__init__(*args, **kwargs)

        class Meta:
            model = usuario
            empty_text = ('No results ...')
            fields = (
                        'id',
                        'dat_criacao_usuario',
                        'nom_usuario',
                        'empresa',
                        'grupo',
                        'statususuario',
                        'ver'
                      )

        def render_id(self, record):
            return record.id

Answer 1

For login a user, you ca use following code:

from django.contrib.auth import authenticate, login

def my_view(request):
    username = request.POST['username']
    password = request.POST['password']
    user = authenticate(request, username=username, password=password)
    if user is not None:
        login(request, user)
        # Redirect to a success page.
        ...
    else:
        # Return an 'invalid login' error message.
        ...

When a user logs in, the user's ID and the backend that was used for authentication are saved in the user's session

Now for access logged user, you can just use request.user

ref: Django Documentation

Answer 2

In your views.py you can access your logged user like this:

    from django.contrib.auth.models import AnonymousUser

    def acesso_consultausuario(request):
        my_user = request.user
        #If you want to know if the user is logged in
        is_user_logged = my_user.is_authenticated

By the way, I am also a Spanish speaker but it is a good practice to code everything in English so you can share and get feedback with the world (even variable names). Hope this helps!