Adding options into array CakePHP

Question

I have another problem. I have to tables: 1 - with users 2 - with groups. Tables are connected with id of groups - groupid from table 1 is connected with id of group from table 2.

I wanted to create list of options using this code:

echo $this->Form->input('Priority', array(
'label' => 'Group', 
'options' => $groups_array
)); 

Now the $group_array should look

like array('1' => 'Admin', '2' => 'User');

I've tried to push group id and group name via this code, but it doesn't work properly (it adds group with ID lowered by 1 - i assume that the ID isn't id of group but ID of name position in array $group_array.

$groups_array = array();

foreach($groups as $group):

echo $group['Group']['ID']; echo $group['Group']['Name'];

array_push($groups_array, $group['Group']['ID']=$group['Group']['Name']);

endforeach;

How can i fix that?

Answer 1

Rather than using array_push(), since you intend to set the array index directly from $group['Group']['ID'], use that value as the index to $groups_array in the assignment:

$groups_array = array();
foreach ($groups as $group) {
  // assign a new key $group['Group']['ID'] directly
  $groups_array[$group['Group']['ID']] = $group['Group']['Name'];
}

Here's what went wrong:

The "reduced by one" issue you describe was sort of a coincidence of having users with ids 1, 2 appending to an array. The first was appended at index 0 and the second as 1. If the array started non-empty, the users would have been appended to the end of it.

When you did

array_push($groups_array, $group['Group']['ID']=$group['Group']['Name']);

...PHP managed to assign the Name key into the existing ID key, overwriting the ID with the name, and then return that value into the second parameter of array_push(). So really what PHP eventually saw was

array_push($groups_array, 'Admin');
array_push($groups_array, 'User');