I have a Django form that uses a different number of fields based on the year/month. So I create the fields in the form like this:
for entry in entry_list:
self.fields[entry] = forms.DecimalField([stuffhere])
but now I don't know how to get the submitted data from the form.
Normally I would do something like:
form.cleaned_data["fieldname"]
but I don't know what the names of the fields are. The debug screen shows my POST data as simply "Entry Object" with a value of "u''". Calling POST.lists() doesn't show anything.
I am sure I am missing something obvious, but I've been stuck on this for a few days too many. Is there a better way to do this? Is all of the data in the request object, but I just don't know how to use it?
Here is the code for the model/form/view: http://pastebin.com/f28d92c0e
Much Thanks!
EDIT:
I've tried out both of the suggestions below. Using formsets was definitely easier and nicer.
I think you might be better off using formsets here. They're designed for exactly what you seem to be trying to do - dealing with a variable number of items within a form.
In this line:
self.fields[entry] = forms.DecimalField(max_digits=4, decimal_places=1, label=nice_label)
entry is a model instance. But fields are keyed by field names (strings). Try something like:
self.fields[entry.entry_name] = forms.Decimal(...)
(substitute appropriate for "entry_name").
Related
I am looking for a way to include extra info in the schema so the API consumer knows what is expected. Think along the lines of a max length on a string or something. I expect this to be in the schema since that basically replaces the API documentation, right?
I have found this: https://github.com/confuser/graphql-constraint-directive which appears to be similar to what I want, however I don't need the implementation/enforcement since django does that already. I just want to communicate these constraints on input fields.
I am very new to this all, so is there maybe a concept of graphql I am missing? Or how do I add this kind of information in the schema?
EDIT: Maybe this is not only for documenting, but also to tell the frontend how to render fields and/or be able to do some frontend validation. Basically like an OPTIONS request or something.
If all you're looking to do is to document something about a specific field or type, you can set a description on either one. Adding a description doesn't seem to be outlined in the official docs, but there is this issue about it.
class MyType(graphene.ObjectType):
class Meta:
description = "Some description for MyType"
my_field = graphene.String(description="Some description for myField")
I have to make some changes in a django project and though I'm familiar with python, I'm not with django.
This is my situation:
I have a table with the field "active". What I need to do is to let the users to sort the table based on the value of the field (yes/no).
I looked into views.py and I realized that there is a view that sorts the table based on the id:
users = User.objects.all().order_by('id')
My questions are:
How can I make the view to sort the table based on the url parameter?
Do I have to create another view or can I use the same with some kind of modifications?
You can use the same view.
def myView(request):
get_param = request.GET.get('my_param', 'id')
#some more processing
users = User.objects.order_by(get_param) #note - you dont need the `all()`
#rest of the code here.
That depends on what you want to render in your template. If both views will render similar html the it's probably better refactor them in a generic view and do the sorting depending on GET parameters.
I like separation of concerns, so another approach may be refactoring the view code inside a helper function and just call it inside each view with separated urls.
If the views doesn't render similar html and are different from each other in every aspect except that they sort something in some place, then I think the best way is to code both view separately.
It's just a consideration problem but answering your question you can get GET params accessing the request.GET or request.POST depending on the method.
Hope it helps!
This is really frustrating,
I can't and can't find how to create a form (I'm guessing a forms.Form form) to update just one field of a more complex model.
The model has 5 fields, and a form to create, update all of them.
But in a different case i need to let the user update only the title (a field in the model), so i need tried so many things until now (including creating an HTML form by hand and from the view to save it, creating a forms.Form and many more, nothing seem to work), There is no code here because i don't even know which one to put....
Maybe some one can help me with that, I'm sure it is a simple thing, But for some reason i am stuck on this for a long time...
Thank you,
Erez
If you're using ModelForms, you just have to define a fields attribute in Meta as a tuple containing just the names of the fields you want. See the documentation.
The usual way I do form handling is like this:
contact = Contact(
name=form.cleaned_data['name'],
email=form.cleaned_data['email'],
message=form.cleaned_data['message'],
newsletter=form.cleaned_data['newsletter']
)
but for long forms, this obviously is a tedious task. I was wondering if there was any Django method I might have missed that automatically assigns the cleaned data to their corresponding column in the database table that I don't have to manually assign them.
Any ideas? Thanks in advance!
Django offers you a Modelform class that was desgined for exactly this task.
I have a db table which has an integer array. But how can I add this field in my model? I tried writing it using IntegerField but on save it is giving error
int() argument must be a string or a number, not 'list
How can I add this field to my model? I am using this field in my views.py so I need to add it in my model. Any suggestions?
You may be interested in using a CommaSeparatedIntegerField.
If you've got a list of integers like this:
my_ints = [1,2,3,4,5]
and a model like this:
class MyModel(models.Model):
values = CommaSeparatedIntegerField(max_length = 200)
then you can save my_ints into a MyModel like this:
m = MyModel(values = ','.join(my_ints))
m.save()
I would look into database normalization. In particular, your database is not even in 1st normal form, the first and probably most significant of the normal forms which states that normalized data should not contain any repeating groups. As a result, the Django object-relational-mapper will have considerable difficulty modeling your data.
By supporting only single, non-repeating types, Django in a sense enforces 1st normal form in data. You could try to write your own SQL to manage this particular field or perhaps find some code on the internet, but perhaps better would be to refactor this field into a many-to-one relationship in its own model. You can find Django documentation on this here.
Clueless' answer is probably the best you can get, but in case you still want to store array of numbers in single field, you can do this - either by manually e.g. pickling it and then storing to TextField, or by writing custom model field that do something like this for you automatically.
Here's the doc: http://docs.djangoproject.com/en/1.1/howto/custom-model-fields/
I got it working by saying textfield in my model.Since i am only using that field for reading it doesnot effect me