I'm using codeIgniter 2.1.4 with Datamapper and i worry about Datamapper performance.
My results are only 2 rows and return successfully!
But when i dumped $posts with var_dump($posts), I'm getting 20.000 code lines with included all data/relations/configs/tables/fields/languages etc..
Sorry, I couldnt paste dumped data because of excessive lines.
What's the problem? Where am I doing wrong?
Its my sample query:
$posts = new post_model();
$posts->where('active', 1)
->where('slug', $slug)
->include_related('users', '*', 'user', true)
->include_related('categories', '*', 'category', true)
->include_related('tags', '*', 'tag', true)
->include_related('groups', '*', 'group', true)
->get_paged($this->uri->segment(4), 50, TRUE);
Include Related Model Assignments:
public $has_one = array('users' =>
array(
'class' => 'users_m',
'other_field' => 'post',
'model_path' => 'application/modules/users',
),
'categories' => array(),
'tags' => array(),
'groups' => array(),
);
Posts Related Assignments:
public $has_one = array(
'request' => array(
'class' => 'posts_m',
'model_path' => 'application/modules/posts',
)
);
By the way..
I set instantiate as false and dumped data decreased to 3.000 lines.. I really didnt understand..
You aren't doing anything wrong -- this is just the way it is.
Try to understand how PHP, and CodeIgniter work.
In PHP5, all objects are assigned by reference. This means that
although you see them when you access a Datamapper object, they are
not copies, and don’t take up memory.
CodeIgniter works by assigning all objects as singletons to $this, so
a var_dump($this) will show you pages and pages of object information.
All other objects that access CI ( either via an automatic mechanism
or through get_instance() ) use references.
So obviously you’ll see all this when you dump a Datamapper object.
Because Datamapper accesses the database, language, and form
validation libraries, which in turn have links to several other
libraries.
http://ellislab.com/forums/viewthread/188420/#890508
$instantiate - If TRUE, then actual objects are instantiated and populated with the columns automatically.
http://datamapper.wanwizard.eu/pages/getadvanced.html
Instantiate TRUE means more data. Intantiate FALSE means less data.
Related
I am using cakephp 2.4.5. I want to find the last record of an associated table. Below is my code
$Latest = $this->ParentModel->find('first',array(
'conditions' => array('ParentModel.id'=>$id),
'order' => array('ParentModel.AssociatedModel.id' => 'DESC')
));
This code has missing column error with ParentModel.AssociatedModel.id but the id column is definitely there. Does it look right in the first place? If not, how can I fix this part or is there a better implementation? Thank you
Have you tried to read the manual about retrieving data? It is clearly explained there.
If AssociatedModel is somehow associated with one of the four association types with ParentModel, you'll have to use this syntax:
$Latest = $this->ParentModel->find('first',array(
'contain' => array('AssociatedModel'),
'conditions' => array('ParentModel.id' => $id),
'order' => array('AssociatedModel.id' => 'DESC')
));
Make sure the other model is included by using recursive or contain(). See this page about Containable.
If your field name in the DB is really containing a dot CakePHP2 will have a problem with that because it uses the dot notation as separator. At least I've never used a dot in a database field, it's doable but doesn't make much sense and obviously breaks Cake, no idea if you can work around that.
You can't do "cross conditions" though associated models, but you can use Containable behavior to filter associated models.
For this, you have to bind the behavior to your model through:
public $uses = array('Containable');
And then do your query:
$this->ParentModel->find('first', array(
'conditions' => array('ParentModel.id' => $id),
'contain' => array(
'AssociatedModel' => array(
'limit' => 1,
'order' => array('id DESC')
)
)
));
This will give you the parent model, and the last associated model.
I guess it should be like this
$Latest = $this->ParentModel->AssociatedModel->find('first',array(
'conditions' => array('ParentModel.id'=>$id),
'order' => array('AssociatedModel.id DESC')
));
Check if it is correct.
I am building a small core piece for my DataMapper ORM library in CodeIgniter to control user's access/edit rights (CRUD) over DataMapper objects itself. For this I want to link a DataMapper Entity, Userrole and Userright together.
The documentation is here http://datamapper.wanwizard.eu/pages/advancedrelations.html (Under head; Multi-table Relationships).
So if I fill in the join table by hand I can just get the values without any problems. The only problem is saving the relationship.
Here are my Model-rules
Userrole
var $has_many = array(
'userright' => array(
'join_table' => 'dm_entities_userrights_userroles',
),
'dm_entity' => array(
'join_table' => 'dm_entities_userrights_userroles',
),
);
Userright
var $has_many = array(
'dm_entity' => array(
'join_table' => 'dm_entities_userrights_userroles',
),
'userrole' => array(
'join_table' => 'dm_entities_userrights_userroles',
),
);
Dm_entity
var $has_many = array(
'userrole' => array(
'join_table' => 'dm_entities_userrights_userroles',
),
'userright' => array(
'join_table' => 'dm_entities_userrights_userroles',
),
);
It seems odd I declared the table twice constantly, but it seems not to work if I don't.
So here's my retrieval code for this relation form the perspective of the Userright;
$userrole = new Userrole;
$userrole->get_where(array('name' => 'Administrator'));
$dm_entity = new Dm_entity;
$dm_entity->get_where(array('name' => 'User'));
$userrights = new Userright;
$userrights->where_related($userrole);
$userrights->where_related($dm_entity)->get();
$output = '';
foreach ($userrights as $userright) {
$output .= '<i><b>'.$userright->name.'</b></i> and ';
}
$output = substr($output, 0, -5);
echo '<b>'.$userrole->name.'</b> has the right to '.$output.' the DataMapper entity <b>'.$dm_entity->name.'</b>.'.br();
So this works without any problems either. But now the saving part:
$new_userright = new Userright;
$new_userright->get_where(array('name' => 'Update'));
$new_userright->save(array($userrole, $dm_entity));
Which results in two entries in the dm_entities_userrights_userroles table where 1 entry has dm_entity_id empty and the other the userrole_id empty.
I hope to avoid making a separate Model for the join table to solve this.
Does anyone know how I can get this to work so it makes one correct entry, instead of two scattered ones?
This is not going to work (as you have noticed).
A relation is between two models, and for each Many to Many relation you need a separate join table.
Although technically you can create a join table with 10 FK's to 10 different models, Datamapper will not be aware of that, and will treat the table as different for every relation, causing duplicates to appear.
The only way to make this work, is to define a model for the join table too, and give that one-to-many relations to each of the other models. You can then use that model to manually add relations by assigning or updating the FK values, and still use the many-to-many relations for retrieval and update.
I have a model called Forwards this model uses a table from my Database. However it is required for some of the views connected to this model to use my costum datasource (This is a datasource i have created which links it to an API).
Now my question how can i add a datasource to a Model that already has a datasource.
And how can i tell the Paginator that it has to use this datasource when it is paginating (so it doesnt confilct)
Update
I have been reading abit it seems the only way to use two datasource in a model is to Hack abit, so i was wondering is it possible to use two models from one controller while still paginating?
i want to keep these settings
public $paginate = array(
'fields' => array(
'Offer.id',
'Offer.name',
'OfferUrl.preview_url',
'Stat.ltr',
'Stat.cpc',
'Category.name',
'Country.name')
, 'conditions' => array('Stat.date' => array(
'conditional' => 'BETWEEN'
, 'values' => array()
),
),
'group' => array('Stat.offer_id'),
'Method' => 'getStats',
'totals' => true,
'limit' => 20
);
I set these within my controller
You can change the data source by calling Model::setDatasSource().
You can change the model the paginator uses by:
$this->Paginator->paginate($ModelInstance);
Or
$this->Paginator->paginate('ModelName');
You might want to read that page.
Don't use Controller::paginate any more but instead $this->Paginator->settings. For settings per model use
$this->Paginator->settings['ModelName'] = array(/*...*/);
I wrote 2 days ago to ask about andConditions and it appeared that I didn't understand the idea but the fact is that for two days now I am stuck with the next step using CakeDC:
How do I implement complex HABTM conditions in "query" methods for CakeDC search plugin?
I have Offer HABTM Feature (tables: offers, features, features_offers) and the below works just fine when used in controller:
debug($this->Offer->find('all', array('contain' => array(
'Feature' => array(
'conditions' => array(
'Feature.id in (8, 10)',
)
)
)
)
)
);
The problem comes when I want to use the same conditions in the search:
public $filterArgs = array(
array('name' => 'feature_id', 'type' => 'query', 'method' => 'findByFeatures'),
);
........
public function findByFeatures($data = array()) {
$conditions = '';
$featureID = $data['feature_id'];
if (isset($data['feature_id'])) {
$conditions = array('contain' => array(
'Feature' => array(
'conditions' => array(
'Feature.id' => $data['feature_id'],
)
)
)
);
}
return $conditions;
}
I get an error:
Error: SQLSTATE[42S22]: Column not found: 1054 Unknown column
'contain' in 'where clause'
which makes me think that I cannot perform this search and/or use containable behavior in searches at all.
Can someone with more experience in the field please let me know if I am missing something or point me to where exactly to find a solution for that - perhaps a section in the cookbook?
EDIT: Also tried the joins. This works perfectly fine in the controller, returning all the data I need:
$options['joins'] = array(
array('table' => 'features_offers',
'alias' => 'FeaturesOffers',
'type' => 'inner',
'conditions' => array(
'Offer.id = FeaturesOffers.offer_id'
),
array('table' => 'features',
'alias' => 'F',
'type' => 'inner',
'conditions' => array(
'F.id = FeaturesOffers.feature_id'
),
)
),
);
$options['conditions'] = array(
'feature_id in (13)' //. $data['feature_id']
);
debug($this->Offer->find('all', $options));
... and when I try to put in the search method I get the returned conditions only in the where clause of the SQL
WHERE ((joins = (Array)) AND (conditions = ('feature_id in Array')))
...resulting in error:
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'joins' in 'where clause'
EDIT: Maybe I am stupid and sorry to say that but the documentation of the plugin sucks a ton.
I double, triple and quadruple checked (btw, have lost already 30 hours at least on 1 filed of the search form facepalm) and the stupid findByTags from the documentation still doesn't make any sense to me.
public function findByTags($data = array()) {
$this->Tagged->Behaviors->attach('Containable', array('autoFields' => false));
$this->Tagged->Behaviors->attach('Search.Searchable');
$query = $this->Tagged->getQuery('all', array(
'conditions' => array('Tag.name' => $data['tags']),
'fields' => array('foreign_key'),
'contain' => array('Tag')
));
return $query;
}
As I understand it
$this->Tagged
is supposed to be the name of the model of the HABTM association.
This is quite far from the standards of cakePHP though: http://book.cakephp.org/2.0/en/models/associations-linking-models-together.html#hasandbelongstomany-habtm
The way it is described here, says that you don't need another model but rather you associate Recipe with Ingredient as shown below:
class Recipe extends AppModel {
public $hasAndBelongsToMany = array(
'Ingredient' =>
array(
'className' => 'Ingredient',
'joinTable' => 'ingredients_recipes',
'foreignKey' => 'recipe_id',
'associationForeignKey' => 'ingredient_id',
'unique' => true,
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'finderQuery' => '',
'deleteQuery' => '',
'insertQuery' => ''
)
);
}
meaning that you can access the HABTM assoc table data from Recipe without needing to define model "IngredientRecipe".
And according to cakeDC documentation the model you need is IngredientRecipe and that is not indicated as something obligatory in the cakePHP documentation. Even if this model is created the HABTM assoc doesn't work properly with it - I tried this as well.
And now I need to re-write the search functionality in my way, using only cakePHP even though I spent already 30 hours on it... so unhappy. :(
Every time I come to do this in a project I always spend hours figuring out how to do it using CakeDC search behavior so I wrote this to try and remind myself with simple language what I need to do. I've also noticed that although Using the CakeDC search plugin with associated models this is generally correct there is no explanation which makes it more difficult to modify it to one's own project.
When you have a "has and belongs to many" relationship and you are wanting to search the joining table i.e. the table that has the two fields in it that joins the tables on either side of it together in a many-to-many relationship you want to create a subquery with a list of IDs from one of the tables in the relationship. The IDs from the table on the other side of the relationship are going to be checked to see if they are in that record and if they are then the record in the main table is going to be selected.
In this following example
SELECT Handover.id, Handover.title, Handover.description
FROM handovers AS Handover
WHERE Handover.id in
(SELECT ArosHandover.handover_id
FROM aros_handovers AS ArosHandover
WHERE ArosHandover.aro_id IN (3) AND ArosHandover.deleted != '1')
LIMIT 20
all the records from ArosHandover will be selected if they have an aro_id of 3 then the Handover.id is used to decide which Handover records to select.
On to how to do this with the CakeDC search behaviour.
Firstly, place the field into the search form:
echo $this->Form->create('Handover', array('class' => 'form-horizontal'));?>
echo $this->Form->input('aro_id', array('options' => $roles, 'multiple' => true, 'label' => __('For', true), 'div' => false, true));
etc...
notice that I have not placed the form element in the ArosHandover data space; another way of saying this is that when the form request is sent the field aro_id will be placed under the array called Handover.
In the model under the variable $filterArgs:
'aro_id' => array('name' => 'aro_id', 'type' => 'subquery', 'method' => 'findByAros', 'field' => 'Handover.id')
notice that the type is 'subquery' as I mentioned above you need to create a subquery in order to be able to find the appropriate records and by setting the type to subquery you are telling CakeDC to create a subquery snippet of SQL. The method is the function name that are going to write the code under. The field element is the name of the field which is going to appear in this part of the example query above
WHERE Handover.id in
Then you write the function that will return the subquery:
function findByAros($data = array())
{
$ids = ''; //you need to make a comma separated list of the aro_ids that are going to be checked
foreach($data['aro_id'] as $k => $v)
{
$ids .= $v . ', ';
}
if($ids != '')
{
$ids = rtrim($ids, ', ');
}
//you only need to have these two lines in if you have not already attached the behaviours in the ArosHandover model file
$this->ArosHandover->Behaviors->attach('Containable', array('autoFields' => false));
$this->ArosHandover->Behaviors->attach('Search.Searchable');
$query = $this->ArosHandover->getQuery('all',
array(
'conditions' => array('ArosHandover.aro_id IN (' . $ids . ')'),
'fields' => array('handover_id'), //the other field that you need to check against, it's the other side of the many-to-many relationship
'contain' => false //place this in if you just want to have the ArosHandover table data included
)
);
return $query;
}
In the Handovers controller:
public $components = array('Search.Prg', 'Paginator'); //you can also place this into AppController
public $presetVars = true; //using $filterArgs in the model configuration
public $paginate = array(); //declare this so that you can change it
// this is the snippet of the search form processing
public function admin_find()
{
$this->set('title_for_layout','Find handovers');
$this->Prg->commonProcess();
if(isset($this->passedArgs) && !empty($this->passedArgs))
{//the following line passes the conditions into the Paginator component
$this->Paginator->settings = array('conditions' => $this->Handover->parseCriteria($this->passedArgs));
$handovers = $this->Paginator->paginate(); // this gets the data
$this->set('handovers', $handovers); // this passes it to the template
If you want any further explanation as to why I have done something, ask and if I get an email to tell me that you have asked I will give an answer if I am able to.
This is not an issue of the plugin but how you build the associations. You need to properly join them for a search across these three tables. Check how CakePHP is fetching the data from HABTM assocs by default.
http://book.cakephp.org/2.0/en/models/associations-linking-models-together.html#joining-tables
Suppose a Book hasAndBelongsToMany Tag association. This relation uses
a books_tags table as join table, so you need to join the books table
to the books_tags table, and this with the tags table:
$options['joins'] = array(
array('table' => 'books_tags',
'alias' => 'BooksTag',
'type' => 'inner',
'conditions' => array(
'Books.id = BooksTag.books_id'
)
),
array('table' => 'tags',
'alias' => 'Tag',
'type' => 'inner',
'conditions' => array(
'BooksTag.tag_id = Tag.id'
)
)
);
$options['conditions'] = array(
'Tag.tag' => 'Novel'
);
$books = $Book->find('all', $options); Using joins allows you to have
a maximum flexibility in how CakePHP handles associations and fetch
the data, however in most cases you can use other tools to achieve the
same results such as correctly defining associations, binding models
on the fly and using the Containable behavior. This feature should be
used with care because it could lead, in a few cases, into bad formed
SQL queries if combined with any of the former techniques described
for associating models.
Also your code is wrong somewhere.
Column not found: 1054 Unknown column 'contain' in 'where clause'
This means that $Model->contain() is somehow called. I don't see such a call in your code pasted here so it must be somewhere else. If a model method can not be found this error usually happens with the field name as column.
I want to share with everyone that the solution to working with HABTM searches with the plugin lies here: Using the CakeDC search plugin with associated models
#burzum, the documentation is far from ok man. Do you notice the use of 'type' => 'checkbox' and that it is not mentioned anywhere that it is a type?
Not to mention the total lack of grammar and the lots of typos and missing prepositions. I lost 2 days only to get a grasp of what the author had in mind and bind the words in there. No comment on that.
I am glad that after 5 days on the uphill work I made it. Thanks anyway for being helpful.
I have an images table and a servers table. images has a server_id field which is a foreign key to the id field in the servers table. The servers table also has a field called name, which is what I want to retrieve.
Here's my controller action code:
$images = $this->Image->find('all', array(
'conditions' => array('Image.user_id' => $this->Auth->user('id')),
'order' => array('Image.uploaded DESC')
));
$this->set('images', $images);
It gets data like this:
Array
(
[0] => Array
(
[Image] => Array
(
[id] => 103
[orig_name] => Untitled-5.jpg
[hash] => MnfWKk
[filename] => MnfWKk.jpg
[uploaded] => 2012-07-12 00:09:08
[views] => 0
[album_id] =>
[user_id] => 15
[server_id] => 1
)
)
)
Instead of server_id, I want to get the name field from the servers table. How can I adapt my find() method to get this? I know it's an SQL join, but I have no idea how to tell Cake to do one in order to get the servers name.
Thanks.
TLDR:
Set up the correct CakePHP associations, and use CakePHP's Containable. (with recursive -1).
Longer Description:
It's best practice to keep your find code in the model itself, so that's what I'll show, but feel free (if you must) to move it back into the controller.
Doing it this way allows you to call the same getImages() function from any controller, and just pass different parameters based on what you want returned. The benefit to coding like this is, you always know if you're looking for code related to queries/database, that you should be looking in the model. It's VERY beneficial when the next person who looks at your code doesn't have to go searching.
Because of the association set up between Image and Server, you can then "contain" the Server info when you query images. But - you can't use "contain" until you specify that you want your model to $actAs = array('Containable');. [ CakePHP Book: Containable ]
Lastly, in your AppModel, it's good practice to set $recursive = -1;. That makes it default to -1 for all models. If for some reason you're against doing that, just make sure to set recursive to -1 any time you use containable. And - once you learn to use containable, you'll never look back - it's awesome. There are a lot more things you can
Code:
//AppModel *******
//...
$recursive = -1;
//...
//Images controller *******
//...
public function whatever() {
$opts = array();
$opts['user'] = $this->Auth->user('id');
$images = $this->Image->getImages($opts);
$this->set(compact('images'));
}
//...
//Image model *******
//...
public $actsAs = array('Containable');
public belongsTo = array('Server');
public function getImages($opts = array()) {
$params = array('condtions'=>array());
//specific user
if(!empty($opts['user'])) {
array_push($params['conditions'], array('Image.user_id'=>$opts['user']);
}
//order
$params['order'] = 'Image.uploaded DESC';
if(!empty($opts['order'])) {
$params['opts'] = $opts['order'];
}
//contain
$params['contain'] = array('Server');
//returns the data to the controller
return $this->find('all', $params);
}
A few other notes
You should also set the association in your Server model.
The code example I gave is written fairly verbosely (is that a word?). Feel free to condense as you see fit
You can also extend the model's getImages() method to accept a lot more parameters like find, limit...etc. Customize this all you want - it's not THE way to do it - just similar to what I usually use.
Per your question, if you only need one field, you can specify in the "contain" what fields you want - see the book for details.
It might seem confusing now, but it's SOO worth learning how to do this stuff right - it will make your life easier.
Cake have a lot of model relationships to achieve this. Check out this page, I think you'll be using the belongsTo relationship
Easy and alternate way for begginers
$images = $this->Image->find('all', array(
'conditions' => array('Image.user_id' => $this->Auth->user('id')),
'joins' => array(
array(
'table' => 'servers',
'alias' => 'Server',
'type' => 'inner', //join of your choice left, right, or inner
'foreignKey' => true,
'conditions' => array('Image.server_id=Server.id')
),
),
'order' => array('Image.uploaded DESC')
));
This is very good in performance