Hey Tom,
First you'll need to create or get a particular instance of your
model using one of it's managers `model.objects` and a query. Ex for a
model with a unique 'name' charfield: `model_obj =
model.objects.get(name='MyObject')`
You can then use the column_name to set that attribute on the instance
`setattr(model_obj, column_name) = 100` and finally save those changes
`model_obj.save()`
See https://docs.djangoproject.com/en/1.11/topics/db/queries/#
-Andrew
On 1/21/2018 9:44 PM, Tom Tanner wrote:
I'm making a terminal command for my Django app:
|
fromdjango.core.management.baseimportBaseCommand,CommandError
fromdjango.core.exceptions importFieldDoesNotExist
fromdjango.apps importapps
classCommand(BaseCommand):
defadd_arguments(self,parser):
parser.add_argument(
"--app",
dest="app",
required=True,
)
parser.add_argument(
"--model",
dest="model",
required=True,
)
parser.add_argument(
"--col",
dest="col",
required=True,
)
defhandle(self,*args,**options):
app_label =options.get('app')
model_name =options.get('model')
column_name =options.get('col')
try:
model
=apps.get_model(app_label=app_label,model_name=model_name)
exceptLookupErrorase:
msg ='The model "%s" under the app "%s" does not exist!'\
%(model_name,app_label)
raiseCommandError(msg)
try:
column =model._meta.get_field(column_name)
exceptFieldDoesNotExistase:
msg ='The column "%s" does not match!'%column_name
raiseCommandError(msg)
else:
print(column,type(column))
# Do stuff here with the column, model.
|
Right now, `column` is `<django.db.models.fields.IntegerField:
column_name>`. I want this instance of `model` to have `column_name`
set to `100`. How can I set and save this instance in this manner?
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