Abstract or generic django class inheritance?
I want to be able to get the list of all wallets in my app - but every wallet needs to be specified as UserWallet, TeamWallet, CarWallet, and so on. There should be no generic wallet instances. I still want to be able to set foreign keys in other models (eg payment model) to the generic wallet model or link in a way to the wallet without having one foreign key for each child model.
I see these advantages for generic class inheritance:
- I can get a list of all wallets
- I can set foreign keys to the parent wallet model
Disadvantages for the generic class inheritance:
- I can't make prohibit creating a generic wallet inheritance.
- Slower cause of JOIN in database
- Confusing DB structure
I see these advantages of using abstract class inheritance:
- No generic wallet instances possible.
- Easy database table structure.
Disadvantages for the abstract class inheritance:
- I need to use itertools or other hacks to get a list of all wallets.
- I need to set up one foreign key for each child model in outside models, or use slow contenttype keys.
As I am pretty new to Python and Django development, I think I'm misssing quite some points. How do you solve these situations?
Example mockup structure:
class Wallet(models.Model):
status = models.CharField(max_length=10)
is_default = models.NullBooleanField()
class UserWallet(Wallet):
user = models.ForeignKey(User, on_delete=models.CASCADE)
class TeamWallet(Wallet):
team = models.ForeignKey(Team, on_delete=models.CASCADE)
class Payment(models.Model):
wallet = models.ForeignKey(Wallet, on_delete=models.CASCADE)
Thanks for your help and any thought.
django class inheritance abstract-class
asked Nov 14 '18 at 13:25
LGGLGG
314
add a comment |
I want to be able to get the list of all wallets in my app - but every wallet needs to be specified as UserWallet, TeamWallet, CarWallet, and so on. There should be no generic wallet instances. I still want to be able to set foreign keys in other models (eg payment model) to the generic wallet model or link in a way to the wallet without having one foreign key for each child model.
I see these advantages for generic class inheritance:
- I can get a list of all wallets
- I can set foreign keys to the parent wallet model
Disadvantages for the generic class inheritance:
- I can't make prohibit creating a generic wallet inheritance.
- Slower cause of JOIN in database
- Confusing DB structure
I see these advantages of using abstract class inheritance:
- No generic wallet instances possible.
- Easy database table structure.
Disadvantages for the abstract class inheritance:
- I need to use itertools or other hacks to get a list of all wallets.
- I need to set up one foreign key for each child model in outside models, or use slow contenttype keys.
As I am pretty new to Python and Django development, I think I'm misssing quite some points. How do you solve these situations?
Example mockup structure:
class Wallet(models.Model):
status = models.CharField(max_length=10)
is_default = models.NullBooleanField()
class UserWallet(Wallet):
user = models.ForeignKey(User, on_delete=models.CASCADE)
class TeamWallet(Wallet):
team = models.ForeignKey(Team, on_delete=models.CASCADE)
class Payment(models.Model):
wallet = models.ForeignKey(Wallet, on_delete=models.CASCADE)
Thanks for your help and any thought.
django class inheritance abstract-class
asked Nov 14 '18 at 13:25
LGGLGG
314
add a comment |
I want to be able to get the list of all wallets in my app - but every wallet needs to be specified as UserWallet, TeamWallet, CarWallet, and so on. There should be no generic wallet instances. I still want to be able to set foreign keys in other models (eg payment model) to the generic wallet model or link in a way to the wallet without having one foreign key for each child model.
I see these advantages for generic class inheritance:
- I can get a list of all wallets
- I can set foreign keys to the parent wallet model
Disadvantages for the generic class inheritance:
- I can't make prohibit creating a generic wallet inheritance.
- Slower cause of JOIN in database
- Confusing DB structure
I see these advantages of using abstract class inheritance:
- No generic wallet instances possible.
- Easy database table structure.
Disadvantages for the abstract class inheritance:
- I need to use itertools or other hacks to get a list of all wallets.
- I need to set up one foreign key for each child model in outside models, or use slow contenttype keys.
As I am pretty new to Python and Django development, I think I'm misssing quite some points. How do you solve these situations?
Example mockup structure:
class Wallet(models.Model):
status = models.CharField(max_length=10)
is_default = models.NullBooleanField()
class UserWallet(Wallet):
user = models.ForeignKey(User, on_delete=models.CASCADE)
class TeamWallet(Wallet):
team = models.ForeignKey(Team, on_delete=models.CASCADE)
class Payment(models.Model):
wallet = models.ForeignKey(Wallet, on_delete=models.CASCADE)
Thanks for your help and any thought.
django class inheritance abstract-class
asked Nov 14 '18 at 13:25
LGGLGG
314
I want to be able to get the list of all wallets in my app - but every wallet needs to be specified as UserWallet, TeamWallet, CarWallet, and so on. There should be no generic wallet instances. I still want to be able to set foreign keys in other models (eg payment model) to the generic wallet model or link in a way to the wallet without having one foreign key for each child model.
I see these advantages for generic class inheritance:
- I can get a list of all wallets
- I can set foreign keys to the parent wallet model
Disadvantages for the generic class inheritance:
- I can't make prohibit creating a generic wallet inheritance.
- Slower cause of JOIN in database
- Confusing DB structure
I see these advantages of using abstract class inheritance:
- No generic wallet instances possible.
- Easy database table structure.
Disadvantages for the abstract class inheritance:
- I need to use itertools or other hacks to get a list of all wallets.
- I need to set up one foreign key for each child model in outside models, or use slow contenttype keys.
As I am pretty new to Python and Django development, I think I'm misssing quite some points. How do you solve these situations?
Example mockup structure:
class Wallet(models.Model):
status = models.CharField(max_length=10)
is_default = models.NullBooleanField()
class UserWallet(Wallet):
user = models.ForeignKey(User, on_delete=models.CASCADE)
class TeamWallet(Wallet):
team = models.ForeignKey(Team, on_delete=models.CASCADE)
class Payment(models.Model):
wallet = models.ForeignKey(Wallet, on_delete=models.CASCADE)
Thanks for your help and any thought.
django class inheritance abstract-class
django class inheritance abstract-class
asked Nov 14 '18 at 13:25
LGGLGG
314
asked Nov 14 '18 at 13:25
LGGLGG
314
edited Nov 14 '18 at 13:31
LGG
asked Nov 14 '18 at 13:25
LGGLGG
314
asked Nov 14 '18 at 13:25
LGGLGG
314
asked Nov 14 '18 at 13:25
LGGLGG
314
314
add a comment |
add a comment |
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