php - Cannot save associated data with hasMany through (Join Model) -

hi, new cakephp , doing project on cakephp 2.3.4.
have associate product metal class through has many through association . doesn't seem working.

model code

class metal extends appmodel { public $hasmany = array(   'metalproduct'  ); }  class product extends appmodel { public $hasmany = array(   'metalproduct'  ); }  app::uses('appmodel', 'model');  class metalproduct extends appmodel {  public $belongsto = array(     'metal' => array(         'classname'    => 'metal',         'foreignkey'   => 'metal_id'     ),    'product' => array(         'classname'    => 'product',         'foreignkey'   => 'product_id'     ) );} 

my database table names metal, products , metal_products

i have multiple select option selecting more 1 metal type.
how the list of metals

     $metals=$this->metal->find('list');     $this->set(compact('metals')); 

formhelper code listbox is

    <?php echo $this->form->input('metal',array('type' => 'select',                                                  'multiple' => true)); ?> 

the product getting saved associations not.
debug array give me this

    $message = array( 'product' => array(     'category_id' => '517a514b-0eb0-4ec9-b018-0b948620d4f0',     'name' => 'mangalsutra diamond',     'slug' => 'mangalsutra_diamond',     'description' => '1212',     'metal' => array(         (int) 0 => '5183cb65-bf90-459c-b22e-0b748620d4f0',         (int) 1 => '5183ce25-c744-433e-b035-0b748620d4f0'     ),     'image' => '121212',     'price' => '12121',     'weight' => '12',     'active' => '1',     'category' => 'mangalsutra' )  ) 

i had put head through walls no clue why associations not getting saved. way in tutorials seems easy, why not working?

i have doubts not saving because metal array passed this

    'metal' => array(         (int) 0 => '5183cb65-bf90-459c-b22e-0b748620d4f0',         (int) 1 => '5183ce25-c744-433e-b035-0b748620d4f0'     ), 

it should mention 'id''rather (int) 0 or something.

also, database table metal_products have created manually has

  id(primary key)   metal_id(foreign key metal.id)   product_id(foreign key product.id) 

am doing wrong naming conventions or way database created? please give me correct ans cause tried others answer not working

i saving via

     $this->product->saveall($this->request->data, array('deep' => true)) 

in model, of in metalproduct model? if need move

class metal extends appmodel { public $hasmany = array(   'metalproduct'  ); } 

to metal model ,

class product extends appmodel { public $hasmany = array(   'metalproduct'  ); } 

to product model

also add belongsto each model

i see have join table. join tables habtm associations. hasmany. need use other options available define foreign key relationships in each model outlined above.

please see examples on cake documentation.

http://book.cakephp.org/2.0/en/models/associations-linking-models-together.html

also, if unsure of how set models correctly, can use bake feature of cakephp generate models , code in regard.

book.cakephp.org/2.0/en/console-and-shells/code-generation-with-bake.html

if more of visual learner video tut should through basics

http://www.youtube.com/watch?v=kjamifqf5s8