I want to know that how to pass an array from laravel controller to laravel model .So that i can save them into db using a model . I don't want to make my controllers to heavy for that I am asking for this . When I have been saving form submissions into db where I should put my saving function ? in controller or model?
Laravel has something called Mass Assignment. It let's you pass an associative array and fills the model with those values. To make it work you have to define all the attributes you want to be able to mass assign in your model:
protected $fillable = ['foo', 'bar', 'and', 'much', 'more'];
Now you can just pass an array to the constructor of the model:
$input = [
'foo' => 'value1',
'bar' => 'value2',
'and' => 'value3',
'much' => 'value4',
'more' => 'value5',
];
$model = new Model($input);
$model->save();
Or even shorter, use the create() method which fills the model and directly saves it afterwards:
Model::create($input);
Try this..
//In Model get data from controller
public function functionname($data1, $data2){
//query
}
//In Controller sent data to Model
$data = Modelname::functionname($data1, $data2)->get();
Related
Q1. I have an Eloquent model that casts an attribute to a Collection.
Calling Collection's method on this attribute doesn't affect the model values. Eg: put()
When using Collections , iam able to do this :
$var = collect();
$var->put('ip', '127.0.0.1');
var_dump($var);
Output as expected :
object(Illuminate\Support\Collection)[191]
protected 'items' =>
array (size=1)
'ip' => string '127.0.0.1' (length=4)
But when i use with a casted attribute on a Eloquent model, this doesn't work as expected
$user = App\User::create(['email'=>'Name', 'email'=>'mail#example.com', 'password'=>bcrypt('1234')]);
$user->properties = collect();
$user->properties->put('ip', '127.0.0.1');
var_dump($user->properties);
object(Illuminate\Support\Collection)[201]
protected 'items' =>
array (size=0)
empty
This doesn't populate the field.
I think that another collection is created, so to work as expected i must assign this new collection to my field.
Like so :
$user->properties = $user->properties->put('ip', '127.0.0.1');
Q2. Is there a proper way to initialize collection of the field by default (create an empty collection if the field is null), without having to call $user->properties = collect(); "manually" every time?
User.php
class User extends Authenticatable
{
protected $casts = [
'properties' => 'collection',
];
...
}
Migration file
Schema::table('users', function($table) {
$table->text('properties')->nullable();
});
Q1: an attribute casted to collection has a getter that returns, each time, a new BaseCollection that is constructed on the value of the attribute.
As already supposed the getter returns another collection instance and every direct change on it does not change the value of the attribute but instead the newly created collection object.
As also pointed by you the only way to set a a collection casted attribute is to assign it his own original value merged with new ones.
So instead of put() you have to use:
$user->properties = $user->properties->put('ip', '127.0.0.1');
// or
$user->properties = $user->properties ->merge(['ip'=>'127.0.0.1'])
Q2: We have to think that the database representation is a text; so IMHO the proper way to initialize a Model in the migration is to give it a default empty json, i.e.:
$table->text('properties')->default('{}');
But this works only for models created without setting the property field and retrieved after.
For a newly created Model my advice is to pass a default void array, i.e.:
App\User::create([
'name'=>'Name',
'email'=>'mail#example.com',
'password'=>bcrypt('1234'),
'properties' => []
]);
In addition to dparoli's outstanding answer, it is also possible to add a default value through Laravel's boot method, which is available on every Model.
Something like the following example code
protected static function boot()
{
parent::boot(); //because we want the parent boot to be run as well
static::creating(function($model){
$model->propertyName = 'propertyValue';
});
}
You can play with this approach if you like as well.
In laravel if i want to insert all the form input and i want to add text in one of the column why cant i use this code?
Example
$B2 = new B2;
$B2::create([
request()->all(),
$B2->column9 = "aaaa",
]);
The inserted database only insert column9, the other column is Null.
Because create() accepts an array as the only parameter:
public static function create(array $attributes = [])
You can do this:
$data = request()->all();
$data['column9'] = 'aaaa';
B2::create($data);
When ever you use request all you must first make sure that you have either fillable fields in your model or guarded = to an empty array so for example:
class B2 extends Model
{
protected $table = 'db_table';
protected $fillable = [
'email',
'name',
];
}
or you can use
protected $guarded = [];
// PLEASE BE CAREFUL WHEN USING GUARDED AS A POSE TO FILLABLE AS IT OPENS YOU TO SECURITY ISSUES AND SHOULD ONLY REALLY BE USED IN TEST ENVIRONMENTS UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!
As for your create method you should make sure its an associative array like this:
$B2::create([
$B2->column9 => "aaaa",
]);
Or you could do something like:
$data = $request->except('_token');
$B2::create($data);
You'll have to merge the array.
$B2::create(array_merge(request()->all(), ['column9' => 'text']));
When you are adding to a database in that was it is called mass assignment. Laravel Automatically protects against this so you need to add the firld names to a fillable attribute in your model
protected $fillable = ['field1', 'column9'] //etc
https://laravel.com/docs/5.4/eloquent#mass-assignment
You also need to make sure you pass an array to the create method
$my_array = $request->all()
$my_array['column9'] = 'aaaa';
$B2::create(
$my_array
);
I have a CMS that allows the user to save and create bike tours. Each bike tour also has categories, which are definined using Laravel's Many to Many relationship utilising an intermediary pivot table. At the point of saving a tour, we don't know if the tour is an existing one being edited, or a new one.
I think I should be using Laravel's firstOrNew method for saving the tour, and the sync method for saving categories. However, all the tutorials very simplistically just give the example of passing a single object to the function like so:
$tour = Tour::firstOrNew($attributes);
But what happens when my $attributes also contains extra stuff, like the categories which are linked to a relationship table, and which I will need to save in the next step? For example this very good tutorial gives the following example:
$categories = [7, 12, 52, 77];
$tour = Tour::find(2);
$tour->categories()->sync($categories);
But what happens if the category data is bundled with the data for the rest of the tour, and instead of using find I need to use firstOrNew to create the tour? Should I keep the categories in the $attributes while I instantiate the tour, then run the sync, then unset them before saving the tour, or...? Is there a better way to achieve this?
EDIT: To be clear, the $attributes variable in my example here is essentially the tour object data bundled together- just as the Laravel/Eloquent system would return it from the transaction using the belongsToMany method- with subequent modifications from the user). ie: here is a snapshot of what it contains:
array (
'id' => 1,
'uid' => '03ecc797-f47e-493a-a85d-b5c3eb4b9247',
'active' => 1,
'code' => '2-0',
'title' => 'Tour Title',
'url_title' => 'tour_title',
'distance_from' => 20,
'distance_to' => 45,
'price_from' => '135.00',
'price_to' => '425.00',
'created_at' => '2013-12-31 15:23:19',
'updated_at' => '2015-07-24 16:02:50',
'cats' => // This is not a column name!
array (
0 => 1,
1 => 7
),
)
All of these attributes are column names in my tours table, other than cats, which references another table via a hasMany relationship. Do I need to unset it manually before I can set this object class and save it with $tour->save?
I am looking for the cleanest most Laravel way to do it?
EDIT2: Here is the relationship defined in the Tours model:
class Tour extends Model
{
protected $guarded = [];
public function cats(){
return $this->belongsToMany('App\TourCategory', 'tour_cat_assignments', 'tour_id', 'cat_id');
}
}
you need to define $fillable property of your Tour model to tell eloquent which attributes to consider when using mass assignment so it will ignore categories related attributes silently. for ex.
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Tour extends Model {
protected $fillable = ['name'] //... other attributes which are part of this model only and laravel will consider only these attributes and ignore category related attributes which you can consider later use.
}
You can use firstOrCreate. The data actually gets persisted using this method.
$categories = [7, 12, 52, 77];
$tour = Tour::firstOrCreate($attributes)->cats()->sync($categories);
Got to make sure the fields are mass-assignable to be able to use the firstOrCreate method though. So either set the fieldnames in the $fillable property or put this in the Tour model:
protected $guarded = [];
Since you have mentioned "CMS" and "subsequent modifications from user", I guess that you are getting your attributes from a Form which means you are getting a Request object/collection.
If that is the case then you can try
$tour = Tour::firstOrCreate($request->except('cats'));
$categories = [];
foreach($request->get('cats') as $key=>$value){
$categories[] = $value;
}
$tour->cats()->sync($categories);
However, if your $attributes us constructed as an array (probably with some manipulations on form data) as per your EDIT then in that case you may try:
$tour = Tour::firstOrCreate(array_except($attributes, ['cats']);
$categories = [];
foreach($attributes['cats'] as $key=>$value){
$categories[] = $value;
}
$tour->cats()->sync($categories);
In any case, you must have the mass assignable fields declared in $fillable property in your model i.e. Tour.
Hope this helps.
I get via Request a Json Object.
I clearly parse this object in order to check if it may fit the destination model.
Instead of assigning property by property. Is there a quick way to populate the model with the incoming object?
If you have an array of arrays, then you can use the hydrate() method to cast it to a collection of the specified model:
$records = json_decode($apiResult, true);
SomeModel::hydrate($records);
If you just have a single record, then you can just pass that array to the model’s constructor:
$model = new SomeModel($record);
Just pass your object casted to array as Model constructor argument
$model = new Model((array) $object);
Internally this uses fill() method, so you may first need to add incoming attributes to $fillable property or first create model and then use forceFill().
You should convert that object to array and use fill($attributes) method.
As method name says, it will fill object with provided values. Keep in mind that it will not persist to database, You have to fire save() method after that.
Or if You want to fill and persist in one method - there is create($attributes) which runs fill($attributes) and save() under the hood.
You can use Mass Assignment feature of Laravel,
You model would look like this:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class User extends Model
{
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = ['name', 'email', 'phone'];
}
And the process of populating the Model would be like this:
// This would be your received json data converted to array
// use 'json_decode($json, true)' to convert json data to array
$json_arr = [
'name' => 'User Name',
'email' => 'email#example.com',
'phone' => '9999999999'
];
$user = new \App\User($json_arr);
Hope this helps!
Castings may fail due to several reasons. A safe way is to add a static function to the model to generate from both array or object. feels like an extension to the model.
public static function generateFromObject($object)
{
$myModel = new MyModel();
foreach($object as $k => $v)
$myModel->{$k} = $v; //for arrays $myModel[$k] = $v;
return $myModel;
}
and you can use anywhere like,
$myModel = MyModel::generateFromObject($myObjectOrArray)->save();
I want to create a whole bunch of instances of a model object in Laravel, then pick the optimal instance and save it to the database. I know that I can create an instance with Model::create([]), but that saves to the database. If possible I'd like to create a bunch of models, then only "create" the one that is best.
Is this possible?
I am using Laravel 5.0
You create a new model simply by instantiating it:
$model = new Model;
You can then save it to the database at a later stage:
$model->save();
You can create instances with Model::make(). It works the same way as create but it doesn't save it.
Whether or not this is best practice is another matter entirely.
Yes, it is possible different ways: you can use the mass assignment without saving.
Please remember to set first the $fillable property in your model.
WAY #1: using the method fill
$model = new YourModel;
$model->fill([
'field' => 'value',
'another_field' => 'another_value'
]);
$model->save();
WAY #2: using the constructor
$model = new YourModel([
'field' => 'value',
'another_field' => 'another_value'
]);
$model->save();
In YourModel set the $fillable property with the fileds allowed for mass assignment:
class YourModel extends Model
{
protected $fillable = ['field', 'another_field'];
// ...
}
Laravel documentation: https://laravel.com/docs/9.x/eloquent#mass-assignment
there is also a method you can call it statically to get new instance:
$modelInstance = $modelName::newModelInstance();
it takes array $attributes = [] as a parameter