I have a Table A related many to many with a Table B and I want to know how many related rows I have in B with a given A entity.
In SQL it would be something like this:
SELECT COUNT(*) FROM AB WHERE A_id=1;
I thought that I should place it in the model of A with a Virtual Field that retrieves the count, but I didn´t find a way to use the model itself to get the related B rows.
I tried with
$this->contain(['B'])->count()
But it didn't work because 'contain' is undefined. So, how should I get the count?
Make sure that u put the association in both of your models initialize method and dont call contain() on $this.
$query = $this->A->find();
numberOfRecords = $query->contain(['B'])->count;
I currently have a users table and a posts table. My posts table has a field for user_id, however, I am not sure how I would grab the users name field which is in the users table. I was thinking of using the models afterFind() method and then using SQL to select the data, but there has to be a better way than this. Also, on my view action, I am using the read() function to grab a single post. Would the models afterFind() kick in after it runs read()? If not, is there an equivalent such as afterRead()?
Just make an association of Post belongsTo User, and every regular find/read operation that has a sufficiently high recursive value will automatically fetch the user with each post.
$post = $this->Post->find(...);
echo $post['User']['name'];
you have to go like below :
$this->Cake->findById(7); Cake.id = 7
here , you can you use your user_id instead of 7 like..
Find BY CAKE PHP
$this->Post->bindModel(array('belongsTo'=>'User'));
$post = $this->Post->findById($post_id);
$userName = $post['User']['name'];
Here are errors, I've typed it in eclipse (:
I would like to retrieve data from a specific table in the Db, but skip the first 2 results. Supposed I have the following:
An Articles controller with an Index action
I would like to use $articles = $this->Articles->find('all' ...
What code should I use to place those results into the $articles variable.
Thanks in advance.
You need to change the offset / limit of your query.
http://book.cakephp.org/view/1018/find
$articles = $this->Articles->find('all', array('offset' => 2));
Would recursive=-1 help in case of find("list") in cakephp. I mean any performance benefit
With the default
$this->Post->find('list');
CakePHP make this query:
SELECT `Post`.`id`, `Post`.`name` FROM `posts` AS `Post` WHERE 1 = 1
No recursive query, so changing that command will not improve the query
No, recursive=-1 will not help full in case of $this->Model->find('list').
If you want to find('all') or find('first') , then it will be more use full.
eg. User , VatInfo , VatInfoLog are three models then
1) recursive=-1
$this->VatInfo->find('all')
Will return only VatInfo table data.
2) recursive=0
$this->VatInfo->find('all')
Will return $belongsTo User And VatInfo 2 tables data.
3) recursive=1
$this->VatInfo->find('all')
Will return $belongsTo User ,$hasMany VatInfoLog And VatInfo 3 tables data.
Try it!
In debug mode Cake shows you the running time of each query. Try both ways and see if anything changes. My guess is no, since it's only taking data from one table anyway for list queries.
I have been trying to figure out how to do this and it seems that its not something that many people are trying to do in cakephp or I am just completely misunderstanding the documentation.. I am using the following query below to get a field value so I get a value where the "findbycreated" is 0... this part works fine
$unregisteredemail = $this->Testmodel->findBycreated('0');
$emailaddress = $unregisteredemail['Testmodel']['emailaddress'] ;
$emailpassword = $unregisteredemail['Testmodel']['password'] ;
But now, after I do some things with this data that I retrieved, I want to mark a field, in the same row, in the same model / table as a value of '1' to indicate that an action has taken place (email address has been successfully created, for example)... I just can't figure out how to do this in cakephp despite my efforts of going through the documentation and searching, this should be rather simple, I am tempted, at this point, to just use a regular mysql query as its a simple query.. basically the query is (please excuse my syntax as I haven't used direct mysql queries in a while) "update (database / table) set 'created'='1' where 'emailaddress'=$emailaddress"
Or I could use the row ID, if needed, as cakephp seems to prefer this, but still can't get how to do this.. this is my attempt below that is not working:
// update database to show that email address has been created
$this->Testmodel->read('emailaddress', $this->Testmodel->findBycreated('0'))
$this->Testmodel->id = 1;
$this->Testmodel->set(array(
'created' => '1'
));
$this->Testmodel->save();
There are, as you can see from the previous answers, several ways to achieve the same end. I'd just like to explain a little about why your way didn't work.
In the model, CakePHP has abstracted the database row(s) into an array according its implementation of ORM . This provides us with a handy way of manipulating the data and chucking it around the MVC architecture.
When you say:
$this->Testmodel->set(array(
'created' => '1'
));
You are dealing directly with the model, but the data is actually stored, as an array, in a class variable called $data. To access and manipulate this data, you should instead say:
$this->data['Testmodel']['created'] => '1';
The reason for specifying the model name as the first index is that where associated tables have been retrieved, these can be accessed in the same way, so you might have , for instance:
Array([Testmodel] => Array ([id] => 1,
[created] => [1],
...
)
[Relatedmodel] => Array ([id] => 1,
[data] => asd,
...
)
)
...and so on. Very handy.
Now, when you use $this->MyModelName->save() with no parameters, it uses $this->data by default and uses the part of the array of data appropriate to the model you are calling the save method on. You can also pass an array of data, formatted in the same way if, for some reason, you don't (or can't) use $this->data.
Your use of the method read() is incorrect. The first parameter should be null, a string or an array of strings (representing fieldname(s)). The second parameter should be the id of the record you wish to read. Instead, for param 2, you are passing the result of a find, which will be an array. The result, which you are not capturing, will be empty.
I would write your code like:
$this->data = $this->Testmodel->read('emailaddress',1);
$this->data['Testmodel']['created'] = 1;
$this->Testmodel->save();
or more succinctly:
$this->Testmodel->id = 1;
$this->Testmodel->saveField('created', 1);
In this situation I would let Cake deal with the id's and just focus on changing the row data and resaving it to the database
$row = $this->Model->findBycreated(0);
$row['Model']['emailaddress'] = 1;
$this->Model->save($row);
This way, you don't have to worry about the id's, as the id will be in your dataset anyway, so just change what you want and then tell Cake to save it.
Ninja edit, Be sure that you are returning a full row with an id from your findBycreated() method.
There're many ways to do your work.I suggest you to read the cookbook about saving data in cakephp.And besides david's solution another simple way would be
$this->Testmodel->id = 1;
$this->Testmodel->saveField('created' =>'1');
Ok, I think I finally found the solution, I was able to get this to work:
$this->Test->updateAll(
array(
'Test.field' => 'Test.field+100'
),
array(
'Test.id' => 1
)
);
I think you have to use updateAll as anything else will just create a new row.. basically CakePHP, for whatever reason, neglected to include a function for updating just one field so you have to put it into an array with the updateAll to make it work...
the +100 is where the updated info goes, so in this case "100" would be what the field is updated to.
In cakephp 3.x the syntax seems to be different. This is what worked for me in 3.x:
$this->Tests->updateAll(
[
'Tests.field = Tests.field+100'
],
[
'Tests.id' => 1
]
];
The difference is that the entire expression needs to be in the value of the first array.