Django Model Field Default to Null
Question:
I need to have my Django application allow me to have a default value of NULL set for a certain model field. I’ve looked over the null, blank, and default parameters, but it’s not very clear what combination of the three I need to use to get the desired effect. I’ve tried setting default=NULL but it threw an error. If I specify blank=True, null=True and no default, will it just default back to NULL come runtime?
Answers:
Try default=None. There is no NULL in python.
If you specify null=True on the model field then the value will be stored as NULL in the database if the user does not provide a value.
blank=True
allows you to input nothing (i.e "", None) and keep it empty.null=True
means the database row is allowed to be NULL.default=None
sets the field to None if no other value is given.
I need to have my Django application allow me to have a default value of NULL set for a certain model field. I’ve looked over the null, blank, and default parameters, but it’s not very clear what combination of the three I need to use to get the desired effect. I’ve tried setting default=NULL but it threw an error. If I specify blank=True, null=True and no default, will it just default back to NULL come runtime?
Try default=None. There is no NULL in python.
If you specify null=True on the model field then the value will be stored as NULL in the database if the user does not provide a value.
blank=True
allows you to input nothing (i.e"",None) and keep it empty.null=True
means the database row is allowed to beNULL.default=None
sets the field toNoneif no other value is given.