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fleetmodulecomputed-fields
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Jun7heJumpeR

I want to create Model (car) name like, Telsa / Model X, and I found this piece of code of Fleet module doing that.

FleetVehicleModel class (models.Model) 
    _name = 'fleet.vehicle.model' 
    _description = 'Model of a vehicle' 
    _order = 'desc' 

    name = fields.Char ('Model name', required = True) 
    brand_id = fields. Many2one ('fleet.vehicle.model.brand', 'Make', required = True, help = 'Make of the vehicle') 
    vendors fields.Many2many = ('res.partner', 'fleet_vehicle_model_vendors',' model_id '' partner_id ', string =' Vendors') 
    image = fields.Binary (related = 'brand_id.image', string = "Logo", readonly = False) 
    image_medium = fields.Binary (related = 'brand_id.image_medium', string = "Logo (medium) ",
    image_small = fields.Binary (related = 'brand_id.image_small', string = "Logo (small)", readonly = False) 

    @ api.multi 
    @ api.depends ('name', 'brand_id') 
    def name_get (self): 
        res = [] 
        for record in self: 
            name = record.name 
            if record.brand_id.name: 
                name = record.brand_id.name + '/' + name 
            res.append ((record.id, name)) 
        return res
I do not understand how this code works when I choose the model then press Save button, it will create a new name under the form "Brand / Model" and replace the old name I filled. 
And I did not see any 'computed field' in this model. 
I figure out by 'print (res)', but I do not understand how this can link 'record.id' in 'res []' to find the new name. 
I also can not find any new fields in Database too.

I will appreciate if someone can explain it. 
Many thanks

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Niyas Raphy (Walnut IT)
Best Answer

Hi,

What is your doubt about ? Is it about the name_get function defined ? The methods is called by Odoo core itself, probably you  will never end up calling those by yourself or not needed to have a compute field for that. Those methods are called by some widgets like many2one to get the display name of the record.


Thanks

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Jun7heJumpeR
Author

In short, I just want to know Where is list res[] in get_name func stored?

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Jun7heJumpeR
Author Best Answer

Well, I want to create a name of a car in the form like "Model/Brand", e.g: ModelX/Telsa. I call this 'formed name'.

Generally, I will create a field: 

Car_name = fields.Char(computed='get_name')

brand_id = fields.Many2one('car.brand')

model_id = fields.Many2one('car.model')

then I will define a 'computed function' to create 'car_name' like I want.

@api.depends('brand_id', 'model_id')

def get_name(self):

car_name = str(brand_id.name) + '/' + str(model_id.name)

then, I can show car_name in my tree.view or form.view. 

It is ok if I do like that.

BUT, when I read the code in Fleet module, there isn't a 'computed field' (to form the name like I want).

If you read name_get func in Fleet code (like, I quoted above), they just use a list res[], then stored the formed name and the id of the record. Then the 'formed name' appears in the tree.view or form.view after I press the Save button.

I just print the list 'res[]', and it stored the id and the 'formed name' as: [(1, ModelX/Telsa),(2, Vios/Toyota)....]

I just dont understand how they can call the formed name through 'res' list only by the id of the record. I checked in the SQL but cant find any field store 'formed name'.

In short, I just want to know Where is list res[] in get_name func stored?

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