I need a simple column for a table.
By example a table "project", with column id
, name
and year
.
If I do:
$q = Doctrine_Query::create()
->select('a.pro_id')
->from('fndr_proyecto a')
->where('a.pro_id =?',1);
$pro = $q->execute();
json_encode($pro->toArray());
The answer is all column like
{"id":1,"name":"Project name","year":2013}
but I need only one column. I expect:
{"id":1}
It is with DQL because with native SQL work fine.
The ORM is build automaticaly with a Visual Paradigm.
This is because Doctrine hydrate the response with all the object information, so all columns.
You need to use a different hydration method, there are many one, but let's focus on 5 of them:
HYDRATE_RECORD
, the default oneHYDRATE_ARRAY
HYDRATE_NONE
HYDRATE_SCALAR
HYDRATE_ARRAY_SHALLOW
You need the HYDRATE_ARRAY_SHALLOW
hydration method. Here's why.
HYDRATE_RECORD
$q = Doctrine_Query::create()
->select('a.pro_id')
->from('fndr_proyecto a')
->where('a.pro_id = ?',1);
$pro = $q->execute(array(), Doctrine_Core::HYDRATE_RECORD);
var_dump(json_encode($pro->toArray()));
This will hydrate the result using object, and also hydrate relations (if you use a leftJoin inside your query). Since it returns object, we need to call toArray()
to be able to send a propre json:
[{"id":1,"name":"Project name","year":2013}]"
HYDRATE_ARRAY
$q = Doctrine_Query::create()
->select('a.pro_id')
->from('fndr_proyecto a')
->where('a.pro_id = ?',1);
$pro = $q->execute(array(), Doctrine_Core::HYDRATE_ARRAY);
var_dump(json_encode($pro));
This will hydrate result as an array an automatically add the primary key:
[{"id":"1","pro_id":"1"}]"
HYDRATE_NONE
$q = Doctrine_Query::create()
->select('a.pro_id')
->from('fndr_proyecto a')
->where('a.pro_id = ?',1);
$pro = $q->execute(array(), Doctrine_Core::HYDRATE_NONE);
var_dump(json_encode($pro));
This won't hydrate result, and return just values:
[["1"]]"
HYDRATE_SCALAR
$q = Doctrine_Query::create()
->select('a.pro_id')
->from('fndr_proyecto a')
->where('a.pro_id = ?',1);
$pro = $q->execute(array(), Doctrine_Core::HYDRATE_SCALAR);
var_dump(json_encode($pro));
This will hydrate result from the select but with key index as the column name with the table alias:
[{"a_pro_id":"1"}]"
HYDRATE_ARRAY_SHALLOW
$q = Doctrine_Query::create()
->select('a.pro_id')
->from('fndr_proyecto a')
->where('a.pro_id = ?',1);
$pro = $q->execute(array(), Doctrine_Core::HYDRATE_ARRAY_SHALLOW);
var_dump(json_encode($pro));
This will hydrate result from the select but with key index as the column name without the table alias:
"[{"pro_id":"1"}]"