Laravel 5.2 - pluck() method returns array

2019-01-23 00:47发布

I'm trying to upgrade my project L5.1 -> L5.2. In upgrade guide there's one thing which isn't clear for me:

The lists method on the Collection, query builder and Eloquent query builder objects has been renamed to pluck. The method signature remains the same.

That's ok, rename refactoting from lists() to pluck() isn't a problem. But what with useful pluck() method which was in L5.0 and L5.1?

From the 5.0 documentation:

Retrieving A Single Column From A Row

$name = DB::table('users')->where('name', 'John')->pluck('name');

What is the alternative for old pluck() method in L5.2?

UPDATE:

Example:

var_dump(DB::table('users')->where('id', 1)->pluck('id'));

L5.1:

// int(1)

L5.2:

// array(1) { [0]=> int(1) }

4条回答
狗以群分
2楼-- · 2019-01-23 01:10

In the original example, why not use the select() method in your database query?

$name = DB::table('users')->where('name', 'John')->select("id");

This will be faster than using a PHP framework, for it'll utilize the SQL query to do the row selection for you. For ordinary collections, I don't believe this applies, but since you're using a database...

Larvel 5.3: Specifying a Select Clause

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劳资没心,怎么记你
3楼-- · 2019-01-23 01:26

The current alternative for pluck() is value().

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Luminary・发光体
4楼-- · 2019-01-23 01:32

laravel pluck returns an array

if your query is $name = DB::table('users')->where('name', 'John')->pluck('name'); then the array is like this (key is the index of the item. auto incremented value)

1=>"name1",
2=>"name2",
.
.
.
100=>"name100"

but if you do like this $name = DB::table('users')->where('name', 'John')->pluck('name','id');

then the key is actual index in the database.

key||value
1=>"name1",
2=>"name2",
.
.
.
100=>"name100"

you can set any value as key.

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该账号已被封号
5楼-- · 2019-01-23 01:36

In Laravel 5.1+, you can use the value() instead of pluck.

To get first occurence, You can either use

DB::table('users')->value('name');

or use,

DB::table('users')->where('id', 1)->pluck('name')->first();
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