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Eloquent Collections 343 1 int 6 So the result is the same, which should we use? Whichever ever one suits us best. I leave the decision up to you. You are over 300 pages into the book by now, and are old and wise. Still handsome though. Well done you! Best Practice Some of the methods available to the collection are duplicates of those available on the query builder. For example, we can use the first() method when building eloquent queries to retrieve only a single model instance. We can also use the first() method of the collection to retrieve the first element contained within. Take a close look at the following example. 1 Album::all()->first(); 2 Album::first(); These two lines both arrive at the same result. The first item within the albums table will be returned as a result. So which should we use? Well, as always, the answer is ‘it depends’. Yes, I know that nobody likes to hear that reply, but sometimes it’s true. Let’s take a look at two different scenarios. In the first scenario, we wish to display the title of the first album stored within the database within one of our templates. Sure, not a problem! We can use the first() method on the Eloquent query builder. Album::first(); In the second scenario, we wish to display a listing of all album titles, but also display the title of the first album within it’s own little box. For example, the ‘album of the year’ section. Well, we could do something like this I suppose. 1 $allAlbums = Album::all(); 2 $albumOfTheYear = Album::first(); I’m sure that would do what we need, but this method will run two queries again the database. Increasing the number of queries sent to the database server is a way of rapidly decreasing application performance. It might not matter within our examples, but within your enterprise software every split second wated is money lost. We could alleviate some stress upon the database server, and reduce the number of queries to one by shifting some of the query responsibilities to the collection.
Eloquent Collections 344 1 $allAlbums = Album::all(); 2 $albumOfTheYear = $allAlbums->first(); We retrieve all of our albums as usual, but this time we use the first() method on the collection to retrieve the album of the year. This results in only a single query. Choosing whether to perform a query on the collection, or on the database is a matter of choice. Querying against the database will allow for faster and more complex searches that would result in high CPU / memory usage on the webserver if performed on the collection. Then again, using the collection effectively can also benefit your application with fewer individual SQL queries. Use your best judgement to decide when to use the collection helper methods. I trust you!
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Laravel: Code Bright Web applicatio
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Also By Dayle Rees Laravel: Code Ha
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CONTENTS Response Shortcuts . . . .
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CONTENTS Fetch Methods . . . . . .
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Errata This may be my second book a
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Translations If you would like to t
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Introduction vi The simple yet conf
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The Primers Hey this chapter wasn
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The Primers 3 1
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The Primers 5 1
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The Primers 7 1 import dayle.blog.*
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The Primers 9 1 { 2 "name": "Lushui
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The Primers 11 1 { 2 "an_object": {
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The Primers 13 Composer Composer is
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The Primers 15 their Github usernam
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The Primers 17 1 "role": "Genius" T
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The Primers 19 You can add as many
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The Primers 21 1 "require": { 2 "xm
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The Primers 23 1 "autoload": { 2 "c
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The Primers 25 1
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The Primers 27 1 php composer.phar
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The Primers 29 21 22 - Installing x
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The Primers 31 1 Loading composer r
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Architecture I want to make Code Br
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Architecture 35 1
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Architecture 37 The Facade in this
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Getting Started Laravel is a framew
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Getting Started 41 Note that the ve
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Getting Started 43 The next task wi
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Getting Started 45 43 location ~ /\
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Getting Started 47 • autoload.php
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Getting Started 49 The Application
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Basic Routing You are on a long, st
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Basic Routing 53 1
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Basic Routing 55 1 http://domain.co
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Basic Routing 57 12 { 13 return "Bo
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Responses When someone asks you a q
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Responses 61 1
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Responses 63 Redirects A Redirect i
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Responses 65 1
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Responses 67 object actually inheri
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Responses 69 1
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Filters I recall a couple of years
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Filters 73 1
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Filters 75 1
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Filters 77 1
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Filters 79 1
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Filters 81 First we need to create
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Filters 83 All of these filters rel
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Controllers 85 it would make sense
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Controllers 87 1
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Controllers 89 Here we have our Art
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Blade 91 standard view files. The o
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Blade 93 1 2 3 {{{ 'alert("CHUNKY
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Blade 95 1 2 3 c~~p ,---------. 4
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Blade 97 1 2 3 4 5 6 7 Narwhal
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Blade 99 1 @section('head') 2 3 @s
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Blade 101 11 We have a template! 12
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Blade 103 24 25 @extends('third')
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Advanced Routing Oh I see, you’re
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Advanced Routing 107 1
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URL Generation 115 1 http://myapp.d
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URL Generation 117 1
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URL Generation 119 1 http://myapp.d
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URL Generation 121 However, in some
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URL Generation 123 1 2 3 My Route
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Request Data Data, and its manipula
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Request Data 127 1 2 3 4 5 6 7
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Request Data 129 1 string(3) "bar"
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Request Data 131 1 array(2) { ["foo
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Request Data 133 1
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Request Data 135 13 var_dump(Input:
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Request Data 137 1
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Request Data 139 1
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Request Data 141 We have added the
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Request Data 143 1 application/pdf
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Request Data 145 1
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Request Data 147 The withCookie() m
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Forms It was a cold, dark night in
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Forms 151 1 2 3 4 5 Here, we use
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Forms 153 1 2 3 5 7 Great! Whil
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Forms 155 1 2 3 {{ Form::open(arra
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Forms 157 1 2 3 6 8 First Name 9
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Forms 159 Password Fields Some thin
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Forms 167 Normal Buttons When we ne
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Forms 169 1
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Forms 171 ARGH. We are all gonna di
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Validation A few months ago I was g
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Validation 175 Simple Validation Do
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Validation 177 1
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Validation 179 22 23 if ($validator
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Validation 181 17 'username' => 'mi
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Validation 183 1
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Validation 185 1 array( 2 'field' =
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Validation 193 1
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Validation 195 1
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Validation 197 We are redirected ba
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Validation 199 20 {{ Form::password
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Validation 201 1 2 3 Registration
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Validation 203 1
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Validation 205 1
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Validation 207 1
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Databases 209 As you can see, you h
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Databases 211 17 'charset' => 'utf8
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Databases 213 1 'my_connection' =>
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Databases 215 Preparing If you want
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Schema Builder 217 The second param
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Schema Builder 219 1
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Schema Builder 225 boolean Not all
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Schema Builder 229 Special Column T
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Schema Builder 235 1 +-------+-----
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Schema Builder 239 1 +-------+-----
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Migrations We have a rather impress
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Migrations 249 1
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Migrations 251 Before we continue t
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Migrations 253 Simply change the mi
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Migrations 255 12 public function u
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Migrations 257 As you can see, our
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Migrations 259 1 $ php artisan migr
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Eloquent ORM 261 18 } 19 20 $book =
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Eloquent ORM 263 1
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Eloquent ORM 265 Let’s visit the
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Eloquent ORM 267 13 */ 14 public fu
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Eloquent ORM 269 1
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Eloquent ORM 271 We have used the s
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Eloquent ORM 273 1 mysql> select *
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Eloquent ORM 275 1
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Eloquent Queries In the previous ch
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Eloquent Queries 279 1
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Eloquent Queries 281 Thanks to this
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Eloquent Queries 283 I don’t beli
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Eloquent Queries 291 Update We don
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