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authorLonnie Ezell <lonnieje@gmail.com>2015-07-21 17:22:41 +0200
committerLonnie Ezell <lonnieje@gmail.com>2015-07-21 17:22:41 +0200
commitcf3cc1dadd44c4dee21978238125355826e5fb24 (patch)
tree8a259761783b2a3565f69fcde1664c98397b75bb /user_guide_src
parente1a94d30e2f30cee36f71c246136fb2db34d25df (diff)
Adding Custom Result object documentation to Query Results docs.
Diffstat (limited to 'user_guide_src')
-rw-r--r--user_guide_src/source/database/results.rst87
1 files changed, 87 insertions, 0 deletions
diff --git a/user_guide_src/source/database/results.rst b/user_guide_src/source/database/results.rst
index ac44566d3..54465b39a 100644
--- a/user_guide_src/source/database/results.rst
+++ b/user_guide_src/source/database/results.rst
@@ -173,6 +173,93 @@ the returned value's type::
$query->unbuffered_row('array'); // associative array
*********************
+Custom Result Objects
+*********************
+
+You can have the results returned as an instance of a custom class instead of a stdClass or array,
+as the ``result()`` and ``result_array()`` methods allow.This requires that the class is already
+loaded into memory. The class will have all values returned from the database set on the class
+as class variables. If your class already has those class variables created and ``protected`` then
+you should provide a ``__set()`` method to allow the class variables to be set.
+
+Example::
+
+ class User {
+ protected $id;
+ protected $email;
+ protected $username;
+ protected $last_login;
+
+ public function last_login($format)
+ {
+ return date($format, $this->last_login);
+ }
+
+ public function __set($name, $value)
+ {
+ $allowed_vars = array('id', 'email', 'username');
+
+ if (in_array($allowed_vars, $name)
+ {
+ $this->$name = $value;
+ }
+ }
+
+ public function __get($name)
+ {
+ if (isset($this->$name))
+ {
+ return $this->$name;
+ }
+ }
+ }
+
+In addition to the two methods listed below, the following methods also can take a class name
+to return the results as: ``first_row()``, ``last_row()``, ``next_row()``, and ``previous_row()``.
+
+**custom_result_object()**
+
+Returns the entire result set as an array of instances of the class requested. The only parameter
+is the name of the class to instantiate.
+
+Example::
+
+ $query = $this->db->query("YOUR QUERY");
+
+ if ($query->num_rows() > 0)
+ {
+ foreach ($query->custom_result_object('User') as $row)
+ {
+ echo $row->id;
+ echo $row->email;
+ echo $row->last_login('Y-m-d');
+ }
+ }
+
+**custom_row_object()**
+
+Returns a single row from your query results. The first parameter is the row number of the results.
+The second parameter is the class name to instantiate.
+
+Example::
+
+ $query = $this->db->query("YOUR QUERY");
+
+ if ($query->num_rows() > 0)
+ {
+ $row = $query->custom_row_object(0, 'User);
+
+ echo $row->email; // access attributes
+ echo $row->last_login('Y-m-d'); // access class methods
+ }
+
+You can also use the ``row()`` method in exactly the same way.
+
+Example::
+
+ $row = $query->custom_row_object(0, 'User);
+
+*********************
Result Helper Methods
*********************