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Eloquent: Relationships 461 You may also retrieve the owner of a polymorphic relation from the polymorphic model by accessing the name of the method that performs the call to morphedByMany. In our case, that is the posts or videos methods on the Tag model. So, you will access those methods as dynamic properties: . 1 $tag = App\Tag::find(1); 2 3 foreach ($tag->videos as $video) { 4 // 5 } Querying Relations Since all types of Eloquent relationships are defined via functions, you may call those functions to obtain an instance of the relationship without actually executing the relationship queries. In addition, all types of Eloquent relationships also serve as query builders, allowing you to continue to chain constraints onto the relationship query before finally executing the SQL against your database. For example, imagine a blog system in which a User model has many associated Post models: . 1
Eloquent: Relationships 462 . 1 $user = App\User::find(1); 2 3 $user->posts()->where('active', 1)->get(); Note that you are able to use any of the query builder on the relationship! Relationship Methods Vs. Dynamic Properties If you do not need to add additional constraints to an Eloquent relationship query, you may simply access the relationship as if it were a property. For example, continuing to use our User and Post example models, we may access all of a user’s posts like so: . 1 $user = App\User::find(1); 2 3 foreach ($user->posts as $post) { 4 // 5 } Dynamic properties are “lazy loading”, meaning they will only load their relationship data when you actually access them. Because of this, developers often use eager loading to pre-load relationships they know will be accessed after loading the model. Eager loading provides a significant reduction in SQL queries that must be executed to load a model’s relations. Querying Relationship Existence When accessing the records for a model, you may wish to limit your results based on the existence of a relationship. For example, imagine you want to retrieve all blog posts that have at least one comment. To do so, you may pass the name of the relationship to the has method: . 1 // Retrieve all posts that have at least one comment... 2 $posts = App\Post::has('comments')->get(); You may also specify an operator and count to further customize the query:
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Laravel 5 Official Documentation Sy
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Contents Contribution Guidelines .
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CONTENTS Control Structures . . . .
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CONTENTS Errors & Logging . . . . .
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CONTENTS Introduction . . . . . . .
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CONTENTS 1 The MIT License (MIT) Co
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Contribution Guidelines 3 - Errors
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Release Notes 5 PSR-2 The PSR-2 cod
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Release Notes 7 For more informatio
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Release Notes 9 Route Cache If your
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Release Notes 11 . 1
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Release Notes 13 Laravel Elixir Lar
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Release Notes 15 Simple Controller
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Release Notes 17 The default Larave
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Release Notes 19 Database Read / Wr
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Upgrade Guide • Upgrading To 5.1.
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Upgrade Guide 23 . 1 public static
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Upgrade Guide 25 Likewise, the app/
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Upgrade Guide 27 Configuration Migr
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Upgrade Guide 29 User Authenticatio
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Upgrade Guide 31 Public Directory C
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Upgrade Guide 33 . 1 'cipher' => MC
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Upgrade Guide 35 This change requir
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Upgrade Guide 37 . 1 'failed' => [
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Contribution Guide • Bug Reports
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Installation • Installation • C
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Installation 43 • Cache • Datab
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Installation 45 Configuration Cachi
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Laravel Homestead • Introduction
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Laravel Homestead 49 Cloning The Ho
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Laravel Homestead 51 . 1 sites: 2 -
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Laravel Homestead 53 . 1 alias vm="
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HTTP Routing • Basic Routing •
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HTTP Routing 57 . 1 Route::get('pos
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HTTP Routing 59 . 1 Route::get('use
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HTTP Routing 61 . 1 Route::group(['
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HTTP Routing 63 Laravel automatical
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HTTP Routing 65 X-XSRF-TOKEN Larave
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HTTP Middleware 67 . 1
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HTTP Middleware 69 Registering Midd
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HTTP Middleware 71 to storage after
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HTTP Controllers 73 . 17 { 18 retur
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HTTP Controllers 75 . 17 } RESTful
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HTTP Controllers 77 . 11 * 12 * @pa
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HTTP Controllers 79 Assigning Route
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HTTP Controllers 81 You may still t
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HTTP Requests • Accessing The Req
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HTTP Requests 85 . 1 $uri = $reques
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HTTP Requests 87 . 1 $input = $requ
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HTTP Requests 89 . 1 {{ old('userna
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HTTP Requests 91 . 1 $request->file
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HTTP Responses 93 . 1 Route::get('h
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HTTP Responses 95 . 1 return respon
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HTTP Responses 97 the controller si
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Views • Basic Usage A> - Passing
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Views 101 share within a service pr
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Views 103 . 1
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Blade Templates • Introduction
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Blade Templates 107 Of course, just
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Blade Templates 109 Note: Be very c
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Blade Templates 111 Comments Blade
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Request Lifecycle • Introduction
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Application Structure • Introduct
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Application Structure 117 . 1 php a
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Service Providers 119 The Register
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Service Providers 121 . 1 use Illum
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Service Container • Introduction
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Service Container 125 Binding A Sin
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Service Container 127 Tagging Occas
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Service Container 129 . 35 } 36 } C
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Contracts 131 Loose Coupling First,
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Contracts 133 In addition, when you
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Contracts 135 . 22 public function
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Facades 137 . 13 * @param int $id 1
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Facades 139 Facade Class Service Co
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Authentication • Introduction •
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Authentication 143 . 17 Remember M
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Authentication 145 . 1 $user = Auth
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Authentication 147 . 1
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Authentication 149 Remembering User
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Authentication 151 . 1 RewriteCond
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Authentication 153 . 1 // Password
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Authentication 155 . 27 After Rese
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Authentication 157 . 9 { 10 /** 11
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Authentication 159 . 15 */ 16 publi
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Authentication 161 . 1
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Artisan Console 163 . 1 php artisan
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Artisan Console 165 Command I/O Def
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Artisan Console 167 . 1 /** 2 * The
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Artisan Console 169 . 1 if ($this->
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Artisan Console 171 . 11 $this->out
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Artisan Console 173 . 1 $this->call
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Laravel Cashier 175 Migration Befor
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Laravel Cashier 177 . 1 $user->subs
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Laravel Cashier 179 Changing Plans
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Laravel Cashier 181 . 1 if ($user->
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Laravel Cashier 183 . 1 $user->char
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Cache • Configuration • Cache U
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Cache 187 drivers defined for your
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Cache 189 . 1 Cache::increment('key
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Cache 191 Adding Custom Cache Drive
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Cache 193 Cache Tags Note: Cache ta
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Collections • Introduction • Cr
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Collections 197 . 1 @foreach ($prod
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Collections 199 . 1 $collection = c
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Collections 203 . 1 $collection->ge
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Collections 207 . 12 */ keys() {#co
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Collections 211 push() {#collection
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Collections 217 The sorted collecti
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Collections 219 . 11 // [1, 2, 10,
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Collections 221 Note: toArray also
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Collections 223 . 1 $unique = $coll
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Laravel Elixir • Introduction •
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Laravel Elixir 227 . 1 // Run all t
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Laravel Elixir 229 1 elixir(functio
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Laravel Elixir 231 . 1 npm install
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Laravel Elixir 233 Versioning / Cac
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Laravel Elixir 235 1 // File: elixi
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Encryption • Configuration • Ba
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Errors & Logging • Introduction
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Errors & Logging 241 . 14 15 return
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Errors & Logging 243 . 13 * 14 * @p
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Events • Introduction • Registe
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Events 247 . 25 } As you can see, t
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Events 249 . 12 } That’s it! Now,
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Events 251 over a websocket connect
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Events 253 . 6 } 7 } However, if yo
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Events 255 . 1
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Filesystem / Cloud Storage • Intr
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Filesystem / Cloud Storage 259 . 27
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Filesystem / Cloud Storage 261 Dele
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Filesystem / Cloud Storage 263 . 19
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Hashing 265 . 22 23 // Validate the
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Helper Functions 267 . 1 $array = a
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Helper Functions 269 . 1 $array = [
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Helper Functions 275 You may also u
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Helper Functions 277 str_contains()
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Helper Functions 279 studly_case()
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Helper Functions 281 . 1 echo url('
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Helper Functions 283 env() {#collec
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Helper Functions 285 . 1 return vie
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Localization 287 . 1 Route::get('we
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Localization 289 So, for example, i
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Mail 291 Mandrill Driver To use the
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Mail 293 Building The Message As pr
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Mail 295 Inline Attachments Embeddi
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Mail 297 Log Driver One solution is
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Package Development 299 Routing To
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Package Development 301 Translation
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Package Development 303 . 1 /** 2 *
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Pagination • Introduction • Bas
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Pagination 307 Paginating Eloquent
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Pagination 309 Appending To Paginat
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Queues • Introduction • Writing
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Queues 313 . 1
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Queues 315 . 1 public function hand
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Queues 317 . 16 * @param int $id 17
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Queues 319 . 21 $this->dispatchFrom
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Queues 321 processes should be moni
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Queues 323 Dealing With Failed Jobs
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Queues 325 . 18 * 19 * @param Maile
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Redis • Introduction • Basic Us
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Redis 329 . 16 public function show
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Redis 331 . 18 * The console comman
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Session • Introduction • Basic
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Session 335 . 1
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Session 337 Retrieving And Deleting
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Session 339 . 32 } 33 } Note that y
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Envoy Task Runner 341 Writing Tasks
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Envoy Task Runner 343 . 1 @servers(
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Envoy Task Runner 345 . 9 @endafter
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Task Scheduling 347 . 1
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Task Scheduling 349 . 1 $schedule->
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Task Scheduling 351 . 1 "guzzlehttp
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Testing 353 . 1
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Testing 355 1 2 {!! csrf_field() !
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Testing 357 Verify Exact JSON Match
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Testing 359 . 1
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Testing 361 . 14 * @return void 15
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Testing 363 Instead of duplicating
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Testing 365 . 1 $users = factory(Ap
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Testing 367 Mocking Facades When te
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Validation • Introduction • Val
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Validation 371 The validate method
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Validation 373 . 1
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Validation 375 Named Error Bags If
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Validation 377 Authorizing Form Req
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Validation 379 Retrieving All Error
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Validation 381 . 1 'custom' => [ 2
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Validation 383 different:field The
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Validation 385 not_in:foo,bar,… T
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Validation 387 . 1 'email' => 'uniq
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Validation 389 . 1
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Database: Getting Started • Intro
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Database: Getting Started 393 . 1
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Database: Getting Started 395 Liste
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Database: Getting Started 397 Using
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Database: Query Builder 399 . 1
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Database: Query Builder 401 . 1 $ti
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Database: Query Builder 403 Joins I
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Database: Query Builder 405 second
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Database: Query Builder 407 . 1 $us
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Database: Query Builder 409 groupBy
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Page 438 and 439: Eloquent: Getting Started • Intro
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Page 484 and 485: Eloquent: Mutators • Introduction
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