How do I update 1 field in CakePHP? - cakephp

I want a function to alter one field, "is_featured" to 1(true) of Event model of given ID, to mark an event as "Featured".
class EventsController extends AppController{
function feature($id){}
}

you can use saveField to do this
for example
$this->Event->id = $id;
$this->Event->saveField('is_featured', true);

You can perform update in one field by two ways:
$this->Model->id=$id;
$this->Model->saveField("fieldName","value");
OR
$this->Model->updateAll(array("fieldName"=>"value"),array("fieldName"=>"condition"));
in second example, first array will update the value in defined field and second array defines the "WHERE" condition

You can also use set() method
$this->Model->read(null, $id);
$this->Model->set(array(
'fieldname' => 'value',
));
$this->Model->save();

In cakephp 3 to update your data:
Include in your Controller:
use Cake\ORM\TableRegistry;
In your action:
$articlesTable = TableRegistry::get('Articles');
$article = $articlesTable->get(12); // Return article with id 12
$article->title = 'CakePHP is THE best PHP framework!';
$articlesTable->save($article);
Source: http://book.cakephp.org/3.0/en/orm/saving-data.html

You can use this technique to update the field(s)
$this->Event->save($this->request->data, true, array('id', 'is_featured'))
If you don’t want the modified field to be automatically updated when saving some data add 'modified' => false to your $data array
If you don’t pass the id, the model cannot set its primary key and will “add” instead of “edit” the field(s)

You can do this easy way
$this->Event->saveField('username', $user); //Where username is Model field name and $user is value

strangely; sometimes I like to resort for plain old sql: one-liner + no overhead there, makes me sure no callbacks/events get involved (beware this may be not what you want!)
$id = (int) $id;
$this->Event->query("UPDATE events SET is_featured=1 WHERE id=$id");

Related

access model data in custom validation rule

I have custom validation rule:
public function customRule($check)
{
}
Inside this rule I would like to access some model data (in database). Of course I can do it like this:
$this->id = 23;
$this->read();
But then all the data in current model will be overidden by read function (I mean $this->data[$this->alias][...] is overridden.
How I can get this data?
Use a regular
$result = $this->find('first', array('conditions' => array($this->alias . '.' . $this->primaryKey => $id));
with the id in the find conditions. And work with the result, it is not overriding the data property.
Just to note that if you want to get the full record of the data that is currently being validated it is always accessible in $this->data inside the validation rule as opposed to $check which contains only the data in the currently validated field.
If you need to validate based on something that is stored in the DB, you can use $this->find() or any of the Model's functions as you are in the Model.
I support #burzum 's answer +1.

CakePHP: Retrieve specific table field in controller

I am new to Cake and tried to find the best solution to retrieve a specific field belonging to an $id:
This is my view function in my Post controller
function view($id = null) {
if (!$id) {
$this->Session->setFlash(__('Invalid post', true));
$this->redirect(array('action' => 'index'));
}
$this->set('post', $this->Post->read(null, $id));
}
In the post table, there is a user_id foreign key. I need to retrieve this specific field belonging to this Post $id.
I read about functions as find('All), read() or just drop an unconventional session in the view through:
$session->write('example') = $post['Post']['user_id];
What is the best way to do this, my preference is to retrieve the field in the controller. Thanks!
CakePHP has a field function which should do just that.
$this->Post->id = $id;
$user_id = $this->Post->field('user_id');
For more information on using field, see: http://book.cakephp.org/2.0/en/models/retrieving-your-data.html#model-field
A second option is to use the find function and returning only a few fields if you do not want the entire Post object. Also shown below is using a condition instead of setting the current Post.
$this->Post->find('first', array(
'conditions'=>array('id'=>$id),
'fields'=>array('user_id')
));
More information on find is available at: http://book.cakephp.org/2.0/en/models/retrieving-your-data.html
$this->Post->id = $id;
$this->Session->write('example',$this->Post->field('user_id'));
In CakePHP 3, you can use $this->Model->get() to get the Entity, and then reference the required field directly.
$fieldValue = $this->ModelName->get($id)->fieldName;
Try this one, since I don't know which field(s) you need I provide an example field array set using Magic Find Types:
$fields = ['title', 'body', 'created'];
$record = $this->Post->findById($id, $fields);
or multiple records
$recordSet = $this->Post->findAllByTitle('The title', $fields);
*Note the the second example doesn't make a lot of sense unless there are multiple titles with the name 'The title' in the the posts.title column.

Using existing field name as different name

i have existing website.
and i write the new back-end (in cakephp) without changing front-end programm
the discomfort that
db table has field names as
id
news_date
news_title
news_content
is it possiable to do something in cakephp model file (reindentify the field names)
so i can use model in controller as
News.date
News.title
News.content
What you need to do is setup some very basic virtual fields in your news model. Something like this should suit your needs.
public $virtualFields = array(
'title' => 'news_title',
'date' => 'news_date',
'content' => 'news_content'
);
Also do yourself a favour by checking out the other model attributes that could help you out, you'll want to set displayType as new_title I'd imagine.
Is said by Dunhamzz, virtualFields are a good solution until you want to work with these new field-names.
Since I assume your frontend needs to use the old names from the database I would go with the afterFind-callback in your model.
Let's say you've got the model news.php:
# /app/model/news.php
function afterFind($results) {
foreach ($results as $key => $val) {
if (isset($val['News']['title'])) {
$results[$key]['News']['news_title'] = $val['News']['title']);
# unset($results[$key]['News']['title']); //use this if you don't want the "new" fields in your array
}
if (isset($val['News']['date'])) {
$results[$key]['News']['news_date'] = $val['News']['date']);
# unset($results[$key]['News']['date']); //use this if you don't want the "new" fields in your array
}
if (isset($val['News']['content'])) {
$results[$key]['News']['news_content'] = $val['News']['content']);
# unset($results[$key]['News']['content']); //use this if you don't want the "new" fields in your array
}
}
return $results;
}
You need to rename the database-fields to your new wanted value. You then can use these within conditions like every other field.
Only difference is, that you get back an array where all your fields have been renamed to your frontend-fields.
For more information about the available callback-methods have a look here: Callback Methods

CakePHP: Can I ignore a field when reading the Model from the DB?

In one of my models, I have a "LONGTEXT" field that has a big dump of a bunch of stuff that I never care to read, and it slows things down, since I'm moving much more data between the DB and the web app.
Is there a way to specify in the model that I want CakePHP to simply ignore that field, and never read it or do anything with it?
I really want to avoid the hassle of creating a separate table and a separate model, only for this field.
Thanks!
Daniel
As #SpawnCxy said, you'll need to use the 'fields' => array(...) option in a find to limit the data you want to retrieve. If you don't want to do this every time you write a find, you can add something like this to your models beforeFind() callback, which will automatically populate the fields options with all fields except the longtext field:
function beforeFind($query) {
if (!isset($query['fields'])) {
foreach ($this->_schema as $field => $foo) {
if ($field == 'longtextfield') {
continue;
}
$query['fields'][] = $this->alias . '.' . $field;
}
}
return $query;
}
Regarding comment:
That's true… The easiest way in this case is probably to unset the field from the schema.
unset($this->Model->_schema['longtextfield']);
I haven't tested it, but this should prevent the field from being included in the query. If you want to make this switchable for each query, you could move it to another variable like $Model->_schemaInactiveFields and move it back when needed. You could even make a Behavior for this.
The parameter fields may help you.It doesn't ignore fields but specifies fields you want:
array(
'conditions' => array('Model.field' => $thisValue), //array of conditions
'fields' => array('Model.field1', 'Model.field2'), //list columns you want
)
You can get more information of retrieving data in the cookbook .
Another idea:
Define your special query in the model:
function myfind($type,$params)
{
$params['fields'] = array('Model.field1','Model.field2',...);
return $this->find($type,$params);
}
Then use it in the controller
$this->Model->myfind($type,$params);
Also try containable behaviour will strip out all unwanted fields and works on model associations as well.
Containable
class Post extends AppModel { <br>
var $actsAs = array('Containable'); <br>
}
where Post is your model?
You can add a beforeFilter function in your Table and add a select to the query
Excample:
public function beforeFind(Event $event, Query $query){
$protected = $this->newEntity()->hidden;
$tableSchema = $event->subject()->schema();
$fields = $tableSchema->columns();
foreach($fields as $key => $name){
if(in_array($name,$protected)){
unset($fields[$key]);
}
}
$query->select($fields);
return $event;
}
In this excample I took the hidden fields from the ModelClass to exclude from result.
Took it from my answer to a simular question here : Hidden fields are still listed from database in cakephp 3

What is the equivalent to getLastInsertId() in Cakephp?

If I do getLastInsertId() immediately after a save(), it works, but otherwise it does not. This is demonstrated in my controller:
function designpage() {
//to create a form Untitled
$this->Form->saveField('name','Untitled Form');
echo $this->Form->getLastInsertId(); //here it works
}
function insertformname() {
echo $this->Form->getLastInsertId(); //this doesnt echo at all
}
Please suggest a way to get the functionality I want.
CakePHP has two methods for getting the last inserted id: Model::getLastInsertID() and Model::getInsertID().
Actually these methods are identical so it really doesn't matter which method you use.
echo $this->ModelName->getInsertID();
echo $this->ModelName->getLastInsertID();
This methods can be found in cake/libs/model/model.php on line 2768
Just use:
$this->Model->id;
In Cake, the last insert id is automatically saved in the id property of the model. So if you just inserted a user via the User model, the last insert id could be accessed via $User->id
id - Value of the primary key ID of
the record that this model is
currently pointing to. Automatically
set after database insertions.
Read more about model properties in the CakePHP API Docs: http://api.cakephp.org/2.5/class-AppModel.html
Edit: I just realized that Model::getLastInsertID() is essentially the same thing as Model->id
After looking at your code more closely, it's hard to tell exactly what you're doing with the different functions and where they exist in the grand scheme of things. This may actually be more of a scope issue. Are you trying to access the last insert id in two different requests?
Can you explain the flow of your application and how it relates to your problem?
You'll need to do an insert (or update, I believe) in order for getLastInsertId() to return a value. Could you paste more code?
If you're calling that function from another controller function, you might also be able to use $this->Form->id to get the value that you want.
Try using this code in your model class (perhaps in AppModel):
function get_sql_insert_id() {
$db =& ConnectionManager::getDataSource($this->useDbConfig);
return $db->lastInsertId();
}
Caveat emptor: MySql's LAST_INSERT_ID() function only works on tables with an AUTO_INCREMENT field (otherwise it only returns 0). If your primary key does not have the AUTO_INCREMENT attribute, that might be the cause of your problems.
this is best way to find out last inserted id.
$this->ModelName->getInsertID();
other way is using
$this->ModelName->find('first',array('order'=>'id DESC'))
There are several methods to get last inserted primary key id while using save method
$this->loadModel('Model');
$this->Model->save($this->data);
This will return last inserted id of the model current model
$this->Model->getLastInsertId();
$this->Model-> getInsertID();
This will return last inserted id of model with given model name
$this->Model->id;
This will return last inserted id of last loaded model
$this->id;
Try to use this code. try to set it to a variable so you can use it in other functions. :)
$variable = $this->ModelName->getLastInsertId();
in PHP native, try this.
$variable = mysqli_insert_id();
This will return last inserted id of last loaded model
$this->id;
This will return last inserted id of model with given model name
$this->Model->id;
This will return last inserted id of the model current model
CakePHP has two methods for getting the last inserted id:
Model::getLastInsertID() and Model::getInsertID().
echo $this->ModelName->getInsertID();
echo $this->ModelName->getLastInsertID();
Below are the options:
echo $this->Registration->id;
echo $this->Registration->getInsertID();
echo $this->Registration->getLastInsertId();
Here, you can replace Registration with your model name.
Thanks
Use this one
function designpage() {
//to create a form Untitled
$this->Form->saveField('name','Untitled Form');
echo $this->Form->id; //here it works
}
You can get last inseted id with many ways.Like Model name is User so best way to fetch the last inserted id is
$this->User->id; // For User Model
You can also use Model function but below code will return last inserted id of model with given model name for this example it will return User model data
$this->User->getLastInsertId();
$this->User->getInsertID();
When you use save(), the last insert ID is set to the model’s $id property. So:
if ($this->Model->save()) {
printf('Last insert ID was %s', $this->Model->id);
}
Each time a save method is called on a model, cake internally calls Model::getLastInsertId() and stores the result into model class attribute id, so after calling save() it is not necessary to call Model::getLastInsertId() or inserId(), as tha value can be directly accessed like this
$id = $this->id;// within a model
$id = $this->{$this->modelName}->id;// in a controller
After insertion of data, we can use following code to get recently added record's id:
$last_insert_id=$this->Model->id;
each time you perform an insert operation on any model, cake internally fetchesthe last insert Id and Sets to Model->id attribute.
so one can access it directly by $Model->id;,
no need to query again for lastInsertId.
I think it works with getLastInsertId() if you use InnoDB Tables in your MySQL Database. You also can use $this->Model->id
$Machinedispatch =
$this->Machinedispatch->find('first',array('order'=>array('Machinedispatch.id DESC')));
Simplest way of finding last inserted row. For me getLastInsertId() this not works.
Actually you are using the getLastInsertId or getInsertId in a wrong manner.
getLastInsertId() is meant to work only after save() method.
It will even not work after a manual insert, as cake engine is storing the mysql_insert_id under $this->_insertID inside the save method which can be retrieved via the getLastInsertId or getInsertId.
Now in your case
$this->Model->id
OR
$this->Model->find('first',array('order'=>'id DESC'))
Will do.
This is interesting, I also stumbled upon this issue. What you asked perhaps how to get the last ID of a certain model regardless of it's state, whether it's just been inserted or not. To further understand what getInsertID does, we need to take a look at the source:
Link 1: http://api20.cakephp.org/view_source/model#line-3375
public function getInsertID() {
return $this->_insertID
}
Yup, that's the only piece of code inside that function. It means that cakephp caches any last inserted ID, instead of retrieve it from the database. That's why you get nothing if you use that function when you haven't done any record creation on the model.
I made a small function to get the last ID of a certain table, but please note that this should not be used as a replacement of getLastID() or getLastInsertID(), since it has an entirely different purpose.
Add the function lastID() to the AppModel as shown below so that it can be used system wide. It has it's limit, which can't be used on model with composite primary key.
class AppModel extends Model {
public function lastID() {
$data = $this->find('first',
array(
'order' => array($this->primaryKey . ' DESC'),
'fields' => array($this->primaryKey)
)
);
return $data[$this->name][$this->primaryKey];
}
}
Original Source : Class Model
In CakePHP you can get it by:
Model::getInsertID() //Returns the ID of the last record this model inserted.
Model::getLastInsertID() //Alias to getInsertID().
$this->Model->field('id', null, 'id DESC')

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