I have Django an model object that looks like this:
class myObj(models.Model):
A = models.TextField()
B = models.DateField()
C = models.ForeignKey(User)
I am obtaining a querySet of myObjs like this:
mList = myObj.objects.all()
I also have a dictionary of Users that looks like this:
uDict = {1: "Hello", 2: "World"} //The keys of this dictionary correspond to the field myObj.C
In my view I am sending both the mList and the uList to my HTML template using the Context.
In my template, I would like to list all the mLists on separate lines. Those mLists that have a matching User entry in the uDict should appear with the matching value from the uList.
How should I do this? In the template I can easily iterate through the mList. But I don't know how to match the myObj.C to the uDict key. I know that this won't work:
{% for currObj in mList %}
{{currObj.A}} {{currObj.B}} {{uDict.currObj.C}}
{% endfor %}
... because uDict.currObj.C won't evaluate correctly.
So what's the best way to do what I'm trying to do?
You can't use a for loop variable as a key to a dictionary in Django unfortunately.
What you can do is package them all in some list or other data set. Something like this:
mList = myObj.objects.all()
uDict = {1: "Hello", 2: "World"}
data_for_template = []
for i in range(len(mList)):
data_for_template.append(
{
'mListObjA':mList.A,
'mListObjB':mList.B,
'uDictObj':uDict[i], # or i+1 for your example uDict
}
)
Then in your template you'll be able to access this data in a similar fashion.
{% for item in data_for_template %}
{{item.mListObjA}} {{item.mListObjB}} {{item.uDictObj}}
{% endfor %}
Essentially you should try and do most of the prep work for your data in your views.py
file to simplify the accessibility in the template.
EDIT:
Something I would try next, in light of your comment:
views.py:
mList = myObj.objects.all()
uDict = {1: "Hello", 2: "World"}
data_for_template = []
for i in range(len(mList)):
data_for_template.append(
{
'mListObj':mList,
'uDictObj':uDict[i], # or i+1 for your example uDict
}
)
html
{% for item in data_for_template %}
{{item.mListObj.A}} {{item.mListObj.B}} {{item.uDictObj}}
{{item.mListObj.C.F.G}}
{% endfor %}
{{data_for_template.N.mListObj.C.F.G}} <!-- Where N is the index of whatever Object you wish to access -->
I think the simplest approach is to add the uDict
values directly to the myObj
instances in your view. This will give you a list rather than a qs in the context, but that shouldn't make any difference in your template.
In your view:
mList = myObj.objects.all()
for my_obj in mList:
my_obj.user = uDict.get(my_obj.C)
This adds the user values to the in-memory instances, so in the template you can get currObj.user
.
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