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symfony/src/Symfony
Michael Lee b587a7294f [config] Fix issue when key removed and left value only
When a key attribute is mapped and the key is removed from the value array, if
only 'value' element is left in the array, it should replace its wrapper
array.

Assume the original value array is as follows (key attribute is 'id').

```php
array(
    'things' => array(
        array('id' => 'option1', 'value' => 'value1'),
        array('id' => 'option2', 'value' => 'value2')
    )
)
```

After normalized, the above shall be converted to the following array.

```php
array(
    'things' => array(
        'option1' => 'value1',
        'option2' => 'value2'
    )
)
```

It's also possible to mix 'value-only' and 'none-value-only' elements in
the array:

```php
array(
    'things' => array(
        array('id' => 'option1', 'value' => 'value1'),
        array('id' => 'option2', 'value' => 'value2', 'foo' => 'foo2')
    )
)
```

The above shall be converted to the following array.
```php
array(
    'things' => array(
        'option1' => 'value1',
        'option2' => array('value' => 'value2','foo' => 'foo2')
    )
)
```

The 'value' element can also be array:

```php
array(
    'things' => array(
        array(
            'id' => 'option1',
            'value' => array('foo'=>'foo1', 'bar' => 'bar1')
        )
    )
)
```
The above shall be converted to the following array.
```php
array(
    'things' => array(
        'option1' => array('foo' => 'foo1', 'bar' => 'bar1')
    )
)
```

When using VariableNode for value element, it's also possible to mix
different types of value elements:
```php
array(
    'things' => array(
        array('id' => 'option1', 'value' => array('foo'=>'foo1', 'bar' => 'bar1')),
        array('id' => 'option2', 'value' => 'value2')
    )
)
```

The above shall be converted to the following array.
```php
array(
    'things' => array(
        'option1' => array('foo'=>'foo1', 'bar' => 'bar1'),
        'option2' => 'value2'
    )
)
```

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #15270
| License       | MIT
| Doc PR        | n/a
2016-12-14 09:02:51 +01:00
..
Bridge [Twig] Fix deprecations with Twig 1.29 2016-12-08 15:02:33 +01:00
Bundle minor #20849 Write an exception message in a one heading line (bocharsky-bw) 2016-12-13 09:34:02 +01:00
Component [config] Fix issue when key removed and left value only 2016-12-14 09:02:51 +01:00