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+--- Thread: Why does $userModel->find(null) return all rows like $userModel->findAll() (/showthread.php?tid=78868)
Why does $userModel->find(null) return all rows like $userModel->findAll() - sba - 03-20-2021
Let's say I have a table with users (id, firstname) and a table with pets (id, id_user, species, petname) and one model each representing the tables.
Now I query all users owning a cat:
$this->userModel = new UserModel();
$this->petModel = new PetModel();
$cat_owner = $this->userModel->find(
$this->petModel->where('species', 'cat')->findColumn('id_user')
);
There are cat owners - find() returns rows of all users owning a cat.
But no one holds an Iguana:
$iguana_owner = $this->userModel->find(
$this->petModel->where('species', 'iguana')->findColumn('id_user')
);
Incorrectly, now we receive all users because $this->petModel->where('species', 'iguana')->findColumn('id_user') returns null and find() acts like findAll()
I know, the query could also be written using join or otherwise... but I don't understand why find(null) returns all rows, whats the idea behind it?
Or am I misunderstanding something about the models, what is the best practice?
RE: Why does $userModel->find(null) return all rows like $userModel->findAll() - kenjis - 03-20-2021
find(null) means no where clause.
So you get all records.
RE: Why does $userModel->find(null) return all rows like $userModel->findAll() - sba - 03-20-2021
(03-20-2021, 06:16 AM)kenjis Wrote: find(null) means no where clause.
So you get all records.
yes, this I understand, it's according the documentation.
But what's the idea behind this? Why does it return all records when I say find(null)?
this is semantically nonsense... search for nothing should return nothing and not all. This would be more logical for my understanding..
furthermore find([]) gives a runtime error (empty where clause)...
to chain model functions it would give IMHO shorter an more simple code if I not need to check first the array containing id(s) to use find()
RE: Why does $userModel->find(null) return all rows like $userModel->findAll() - kenjis - 03-20-2021
(03-20-2021, 06:45 AM)sba Wrote: But what's the idea behind this? Why does it return all records when I say find(null)?
this is semantically nonsense... search for nothing should return nothing and not all. This would be more logical for my understanding..
Well, you have a point.