model relationships dependant on others
I'm trying to do something, I'm not sure if it's possible...
I need a User, who needs a Manager. BUT, if the User has a Pod, their manager can be derived from the Pod.owner (in fact, it must be).
So, something like:
class User
belongs_to :pod, optional: true
belongs_to :manager, class_name: "User", foreign_key: "report_id", optional: true
???
end
Essentially, if the :pod exists, a manager is not needed because :manager will be pod.owner.
Because I'm an idiot I tried to monkey patch it thusly:
def manager
(pod.nil?) ? manager : pod.owner
end
I'll leave it as an exercise to the user as to why this is nonsense :D
Any thoughts?
ruby-on-rails activerecord relational-database
asked Nov 14 '18 at 18:01
Paul HarkerPaul Harker
5618
add a comment |
I'm trying to do something, I'm not sure if it's possible...
I need a User, who needs a Manager. BUT, if the User has a Pod, their manager can be derived from the Pod.owner (in fact, it must be).
So, something like:
class User
belongs_to :pod, optional: true
belongs_to :manager, class_name: "User", foreign_key: "report_id", optional: true
???
end
Essentially, if the :pod exists, a manager is not needed because :manager will be pod.owner.
Because I'm an idiot I tried to monkey patch it thusly:
def manager
(pod.nil?) ? manager : pod.owner
end
I'll leave it as an exercise to the user as to why this is nonsense :D
Any thoughts?
ruby-on-rails activerecord relational-database
asked Nov 14 '18 at 18:01
Paul HarkerPaul Harker
5618
add a comment |
I'm trying to do something, I'm not sure if it's possible...
I need a User, who needs a Manager. BUT, if the User has a Pod, their manager can be derived from the Pod.owner (in fact, it must be).
So, something like:
class User
belongs_to :pod, optional: true
belongs_to :manager, class_name: "User", foreign_key: "report_id", optional: true
???
end
Essentially, if the :pod exists, a manager is not needed because :manager will be pod.owner.
Because I'm an idiot I tried to monkey patch it thusly:
def manager
(pod.nil?) ? manager : pod.owner
end
I'll leave it as an exercise to the user as to why this is nonsense :D
Any thoughts?
ruby-on-rails activerecord relational-database
asked Nov 14 '18 at 18:01
Paul HarkerPaul Harker
5618
I'm trying to do something, I'm not sure if it's possible...
I need a User, who needs a Manager. BUT, if the User has a Pod, their manager can be derived from the Pod.owner (in fact, it must be).
So, something like:
class User
belongs_to :pod, optional: true
belongs_to :manager, class_name: "User", foreign_key: "report_id", optional: true
???
end
Essentially, if the :pod exists, a manager is not needed because :manager will be pod.owner.
Because I'm an idiot I tried to monkey patch it thusly:
def manager
(pod.nil?) ? manager : pod.owner
end
I'll leave it as an exercise to the user as to why this is nonsense :D
Any thoughts?
ruby-on-rails activerecord relational-database
ruby-on-rails activerecord relational-database
asked Nov 14 '18 at 18:01
Paul HarkerPaul Harker
5618
asked Nov 14 '18 at 18:01
Paul HarkerPaul Harker
5618
asked Nov 14 '18 at 18:01
Paul HarkerPaul Harker
5618
asked Nov 14 '18 at 18:01
Paul HarkerPaul Harker
5618
asked Nov 14 '18 at 18:01
Paul HarkerPaul Harker
5618
5618
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
That's an interesting design problem in my opinion and I'm sure there are plenty of valid solutions. Here is the first that comes to my mind. Instead of overriding the manager method that's defined by the association, I would rename the manager association to direct_manager. I makes its role explicit. Then, you can define manager as it's no longer defined. The end result would be:
class User
belongs_to :pod, optional: true
belongs_to :direct_manager, class_name: "User", foreign_key: "report_id", optional: true
def manager
return pod.owner if pod.present?
direct_manager
end
end
```
Note that I used a guard clause instead of the ternary operator, but it's only a matter of personal taste on the code style.
answered Nov 14 '18 at 18:49
Sophie DézielSophie Déziel
404211
This is great! Thanks so much
– Paul Harker
Nov 15 '18 at 8:50
Hi Sophie - or anyone else who see this - I now need to overload manager= to create users... I've trieddef manager= (user); direct_manager = user; save; endbut this doesn't work. I need to be able toUser.create!(manager: boris)and have it assign direct_manager...
– Paul Harker
Nov 15 '18 at 10:07
1
Figured it out!def manager= (user); self[:report_id] = user.id; endThanks again for the direction.
– Paul Harker
Nov 15 '18 at 10:14
add a comment |
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1 Answer
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active
oldest
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1 Answer
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active
oldest
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oldest
votes
That's an interesting design problem in my opinion and I'm sure there are plenty of valid solutions. Here is the first that comes to my mind. Instead of overriding the manager method that's defined by the association, I would rename the manager association to direct_manager. I makes its role explicit. Then, you can define manager as it's no longer defined. The end result would be:
class User
belongs_to :pod, optional: true
belongs_to :direct_manager, class_name: "User", foreign_key: "report_id", optional: true
def manager
return pod.owner if pod.present?
direct_manager
end
end
```
Note that I used a guard clause instead of the ternary operator, but it's only a matter of personal taste on the code style.
answered Nov 14 '18 at 18:49
Sophie DézielSophie Déziel
404211
This is great! Thanks so much
– Paul Harker
Nov 15 '18 at 8:50
Hi Sophie - or anyone else who see this - I now need to overload manager= to create users... I've trieddef manager= (user); direct_manager = user; save; endbut this doesn't work. I need to be able toUser.create!(manager: boris)and have it assign direct_manager...
– Paul Harker
Nov 15 '18 at 10:07
1
Figured it out!def manager= (user); self[:report_id] = user.id; endThanks again for the direction.
– Paul Harker
Nov 15 '18 at 10:14
add a comment |
That's an interesting design problem in my opinion and I'm sure there are plenty of valid solutions. Here is the first that comes to my mind. Instead of overriding the manager method that's defined by the association, I would rename the manager association to direct_manager. I makes its role explicit. Then, you can define manager as it's no longer defined. The end result would be:
class User
belongs_to :pod, optional: true
belongs_to :direct_manager, class_name: "User", foreign_key: "report_id", optional: true
def manager
return pod.owner if pod.present?
direct_manager
end
end
```
Note that I used a guard clause instead of the ternary operator, but it's only a matter of personal taste on the code style.
answered Nov 14 '18 at 18:49
Sophie DézielSophie Déziel
404211
This is great! Thanks so much
– Paul Harker
Nov 15 '18 at 8:50
Hi Sophie - or anyone else who see this - I now need to overload manager= to create users... I've trieddef manager= (user); direct_manager = user; save; endbut this doesn't work. I need to be able toUser.create!(manager: boris)and have it assign direct_manager...
– Paul Harker
Nov 15 '18 at 10:07
1
Figured it out!def manager= (user); self[:report_id] = user.id; endThanks again for the direction.
– Paul Harker
Nov 15 '18 at 10:14
add a comment |
That's an interesting design problem in my opinion and I'm sure there are plenty of valid solutions. Here is the first that comes to my mind. Instead of overriding the manager method that's defined by the association, I would rename the manager association to direct_manager. I makes its role explicit. Then, you can define manager as it's no longer defined. The end result would be:
class User
belongs_to :pod, optional: true
belongs_to :direct_manager, class_name: "User", foreign_key: "report_id", optional: true
def manager
return pod.owner if pod.present?
direct_manager
end
end
```
Note that I used a guard clause instead of the ternary operator, but it's only a matter of personal taste on the code style.
answered Nov 14 '18 at 18:49
Sophie DézielSophie Déziel
404211
That's an interesting design problem in my opinion and I'm sure there are plenty of valid solutions. Here is the first that comes to my mind. Instead of overriding the manager method that's defined by the association, I would rename the manager association to direct_manager. I makes its role explicit. Then, you can define manager as it's no longer defined. The end result would be:
class User
belongs_to :pod, optional: true
belongs_to :direct_manager, class_name: "User", foreign_key: "report_id", optional: true
def manager
return pod.owner if pod.present?
direct_manager
end
end
```
Note that I used a guard clause instead of the ternary operator, but it's only a matter of personal taste on the code style.
answered Nov 14 '18 at 18:49
Sophie DézielSophie Déziel
404211
answered Nov 14 '18 at 18:49
Sophie DézielSophie Déziel
404211
answered Nov 14 '18 at 18:49
Sophie DézielSophie Déziel
404211
answered Nov 14 '18 at 18:49
Sophie DézielSophie Déziel
404211
404211
This is great! Thanks so much
– Paul Harker
Nov 15 '18 at 8:50
Hi Sophie - or anyone else who see this - I now need to overload manager= to create users... I've trieddef manager= (user); direct_manager = user; save; endbut this doesn't work. I need to be able toUser.create!(manager: boris)and have it assign direct_manager...
– Paul Harker
Nov 15 '18 at 10:07
1
Figured it out!def manager= (user); self[:report_id] = user.id; endThanks again for the direction.
– Paul Harker
Nov 15 '18 at 10:14
add a comment |
This is great! Thanks so much
– Paul Harker
Nov 15 '18 at 8:50
Hi Sophie - or anyone else who see this - I now need to overload manager= to create users... I've trieddef manager= (user); direct_manager = user; save; endbut this doesn't work. I need to be able toUser.create!(manager: boris)and have it assign direct_manager...
– Paul Harker
Nov 15 '18 at 10:07
1
Figured it out!def manager= (user); self[:report_id] = user.id; endThanks again for the direction.
– Paul Harker
Nov 15 '18 at 10:14
This is great! Thanks so much
– Paul Harker
Nov 15 '18 at 8:50
This is great! Thanks so much
– Paul Harker
Nov 15 '18 at 8:50
Hi Sophie - or anyone else who see this - I now need to overload manager= to create users... I've tried
def manager= (user); direct_manager = user; save; end but this doesn't work. I need to be able to User.create!(manager: boris) and have it assign direct_manager...– Paul Harker
Nov 15 '18 at 10:07
Hi Sophie - or anyone else who see this - I now need to overload manager= to create users... I've tried
def manager= (user); direct_manager = user; save; end but this doesn't work. I need to be able to User.create!(manager: boris) and have it assign direct_manager...– Paul Harker
Nov 15 '18 at 10:07
1
1
Figured it out!
def manager= (user); self[:report_id] = user.id; end Thanks again for the direction.– Paul Harker
Nov 15 '18 at 10:14
Figured it out!
def manager= (user); self[:report_id] = user.id; end Thanks again for the direction.– Paul Harker
Nov 15 '18 at 10:14
add a comment |
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