Suppose I have the field status in all my database tables. When I want to delete a record, instead of purging it I set the value of field status to 0. This means of course all my queries will always use a where clause such as:
WHERE status = 1
However, this means I have to write and append where('status', '=', 1) to all methods of my eloquent model. It will always be like:
Post::find(1).where('status', '=', 1)
Post::where('status', '=', 1)->get()
Post::find(1).where('status', '=', 1).comments().where('status', '=', 1)->get()
Is there a way to define something as a default scope to have where status = 1 always present in all methods of my model and all the time?
I appreciate any help!
This should do the trick, at least regarding soft delete:
http://four.laravel.com/docs/eloquent#soft-deleting
You could use the scope methods.
public function scopeActive($query)
{
$query->where('status', '=', 1);
}
Then, you use like this:
Post::active()->get();
Related
I have 2 models, Transaction, TrackingNumber.
The relationships and fields are:
Transaction: hasMany TrackingNumber
Transaction fields: id | carrier
TrackingNumber fields: id | transaction_id
I am trying to query TrackingNumbers but I want to return only where the carrier is ups. In this sense:
a) If I use eager loading, it will return all the tracking numbers regardless of shipper and only return transaction relationship based on the where:
$collection = TrackingNumber::with(['transaction' => function($q) {
$q->where('carrier', 'ups')
}])->get();
So this is not what I want. What I want is that the $collection has only the TrackingNumbers with given carrier instead.
b) If I do something like this, the result is what I want, but it is very inefficient (as it makes 2 queries and stores data in array; also if the array is too big, it fails on whereIn.)
$transactionIds = Transaction::where('carrier', 'ups')->pluck('id');
$trackingNumbers = TrackingNumber::whereIn('id', $transactionIds)->get();
// The result is what I want but it is inefficient.
c) I also tried something like this but it doesn't care about the where :/
\DB::table('tracking_numbers')
->join('transactions', 'tracking_numbers.transaction_id', '=', 'transactions.id')
->where('transactions.carrier', 'ups')
->get();
d) I don't want to use whereHas() because it gets extremely slow with a lot of data (I have +1m rows in my tables)
What is the Laravel way to achieve this?
Using whereHas should get you the results you want:
TrackingNumber::whereHas('transaction', function ($query) {
$query->where('carrier', 'ups');
})->get();
Or, try restructuring the query from c like:
\DB::table('tracking_numbers')
->join('transactions', function ($join) {
$join->on('tracking_numbers.transaction_id', '=', 'transactions.id')
->where('transactions.carrier', 'ups');
})
->get();
$konten = Konten::all()->where('kategori','Announcement' AND 'kategori','Activities')->sortByDesc('id');
It's not work what is the right query for using AND Logic in query sir ? im so sorry i don't have much knowledge to find out the way.. the point is i want $konten contains the row from Konten where the kategori is Announcement and Activities.. how to make it happen ? it just showing konten where the kategori is activities the announcement not passed..
You can chain several where to achieve AND:
$konten = Konten::where('kategori', 'Announcement')
->where('kategori', 'Activities')
->orderBy('id', 'desc')
->get();
Or use whereIn like this:
$konten = Konten::whereIn('kategori', ['Announcement', 'Activities'])
->orderBy('id', 'desc')
->get();
To achieve an AND in Laravel, you simply chain ->where() calls:
$konten = Konten::where('kategori','Announcement')->where('kategori','Activities') ...
As a side note, Konten::all() returns a Collection, and is no longer database logic. You shouldn't call ::all() unless you specifically need every record in the database.
Refactor to the following:
$konten = Konten::where('kategori','Announcement')
->where('kategori','Activities')
->orderBy('id', 'desc')
->get();
This will leverage the database to perform the filtering/ordering, instead of offloading every record into a Collection and allowing PHP to perform the same logic, which can be incredibly inefficient depending on the number of records.
try this:
$konten = Konten::whereIn('kategori', ['Announcement', 'Activities'])->orderBy('id', 'desc')->get();
I have a strong feeling that you probably seek for 'orWhere' clause... If you want ALL records when kategori column equals 'Announcement' and all records when kategori equals 'Activities' you sholud use orWhere clause like so:
$konten = Konten::where('kategori', 'Announcement')
->orWhere('kategori', 'Activities')
->orderBy('id', 'desc')
->get();
Or as mentioned in answers below you can use whereIn statement.
I use the query to get the models that the user has, but only 1 model is returned for each user. How to get all? If I set $count=3 I should receive 3 or more models in group, but only first row is returned
$items->where(/*.....*/)
->groupBy('user_id')
->havingRaw("COUNT(*) >= {$count}")->get()
UPDATE
I solved it. I created a separate function for preparing the query and used it 2 times.
I think this may be an incorrect solution, but it works
$items = Items::query();
$this->prepareQuery($request, $items)
$items->whereHas('user', function ($q) use ($count, $request){
$q->whereHas('items', function ($query) use ($request){
$this->prepareQuery($request, $query);
}, '>=', $count);
})
->paginate(4);
This may work.Sometimes take can help.
$items->where(/*.....*/)
->groupBy('user_id')
->take({{$count}});
If you have relationships set up you can quite simply call:
$model->models()
$model being the model you're wanting the list for.
models() being the name of the relationship between the two items.
For example, a post may have many comments. You can call $post->comments() to get a list of the posts comments.
You may also query this from the database directly with some eloquent magic.
Post::with('comments')->where(/*....*/)->get();
EDIT:
You can check to see if a model has X number of related models like so.
Post::has('comments', '>=', 3)->where(/*...*/)->get();
How can I get all records from the table where status value is 0 or NULL on Laravel?
DB::table('categories')->where('status', '!=', 1)
returns only records where status=0
P.S. I need multiple conditions here, so raw query is not so good choice.
You said you'll have another where conditionals, so you need to use a closure:
DB::table('categories')->where(function($q) {
$q->whereNull('status')->orWhere('status', 0);
})
// Other where conditionals.
->get();
You can use orWhereNull:
DB::table('categories')->where('status', '=', '0')->orWhereNull('status')->get();
If I do this:
return $this->roles()->detach($role);
all roles are removed.
How to limit that to only the last one?
You can do it without timestamps:
$lastRole = $user->roles()
->orderBy( $user->roles()->getTable() .'id', 'desc')
->first();
$user->roles()->detach($lastRole);
or with timestamps:
$lastRole = $user->roles()->latest()->first();
$user->roles()->detach($lastRole);
you may try this, I did not test it:
return $this->roles()->orderBy('id', 'desc')->first()->detach($role);
You can also order by timestamps, if no primary id is present, like this:
return $this->roles()->orderBy('created_at', 'desc')->first()->detach($role);
for this to work, you also have to edit your model, from the docs:
If you want your pivot table to have automatically maintained
created_at and updated_at timestamps, use the withTimestamps method on
the relationship definition:
return $this->belongsToMany('Role')->withTimestamps();
Another thing would be not to use model at all, because looking at this issue #3585 it is not that easy. Taylor closed it without a comment, so I assume it not get implemented. The solution should be (assuming you have timestamps columns migrated in the table). Tested code:
$last = DB::table($user->roles()->getTable())
->orderBy('created_at', 'desc')
->first();
DB::table($user->roles()->getTable())
->where('created_at', '=', $last->created_at)
->delete();