method write odoo

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Writing with the write() method

We can also use the write() method to update several fields of several records at the same time, using a single database instruction. So its usage should be preferred in cases where efficiency is important.

The write() method takes a dictionary to map fields to values. These are updated on all elements of the recordset and nothing is returned, as shown here:

Unlike object-style assignment, when using the write() method, we can't assign recordset objects to relational fields directly. Instead, we need to use the record IDs that need to be extracted from the recordset.

When writing on a many-to-one field, the value ...

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Extending create() and write(), extending create() method.

We can extend the create() function of a model to add any additional functionality while creating a record of the model.

Let’s take an example by adding a 'notes’ field in the ‘sale.order’.Here, users who are not in the ‘Administration/Access Rights’ group will get a ‘UserError ‘ when modifying the notes field.

We can do the same thing as an example of the write() method.Before writing, we check group and presence of the field in the vals to write and raise a UserError exception if there is a problem.

Overriding _name_search()

We can search for a record in the Many2one widget by whatever fields in the model by redefining name_search.

Let’s take an example: If we want to search a partner based on phone number or their email also not only it’s name in the Many2one field,

First we need to inherit the res.partner and override the _name_search() function.

We pass most of the arguments that we receive unchanged to the super()implementation of the method:

• name is a string that contains the value the user has typed so far, the user input.
• args is either None or a search domain that's used as a prefilter for the possible records. (It can come from the domain parameter of the Many2one relation, for instance.)
• operator is a string containing the match operator. Generally, you will have 'ilike' or '=' .Customizing how records are searched
• limit is the maximum number of rows to retrieve.
• name_get_uid can be used to specify a different user when calling name_get() to compute the strings to display in the widget.

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Home / Blogs Overview of ORM (Object Relational Mapping) Methods in Odoo15

Overview of ORM (Object Relational Mapping) Methods in Odoo15

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ORM stands for Object Relational Mapping. With the help of ORM methods, fill the gap between Open-objects and SQL tables. Object Relational Mapping helps to perform SQL queries. In Odoo, ORM methods help to create, update, delete, and search records in the database. ORM methods help to reduce development time and cost.

Common ORM Methods

The create() method is used to create new data records in the database. First, specify the model and define a dictionary.

Example: Here showing an example of partner creation

self. env[‘res. partner’].create({‘name’:”Test”})

The write () method is used to update the values of the record set. Specify the data dictionary and updated the record with these values.

Here showing an example of partner updation

self.write({name: “Test”})

        in the above example, the record name becomes changed to Test

  This method is used to search records within the model based on the search domain which is passed. In this method pass arguments.

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Here shows an example of a Partner searching with the name

self.env[“res. partner”].search([(“name”,”=”,”Test”)])

  In the above example return Test named record sets

This method used to browse record sets with ID

Example: self.env[“res.partner].browse(id)

The copy() method is used to duplicate a data record in the current model.

Example: self.copy()

search_count ()

This method is used to get several records in the search method.

  Example: self.env[‘res.partner’].search_count([(‘is_company’,’=’,True)])

This returns the total number of partners in your database

The uplink method is used to delete/remove the data record from the model and database.

Example: self.unlink()

  In the above example, the current record becomes deleted

ensure_one()

The insertion() method checks whether the record is single

If not single raises an exception.

Example: self.ensure()

  This method used to filter records in a specific condition

self. env[‘sale. order’].filtered(lambda x:x.state == “sale”)

This returns a list of sale orders with the sale order state

This method returns the field values

  Example: self.env[‘sale.order’].search([(‘state’,’=’,’sale’)]).mapped(‘partner_id’)

  In the above example search sell orders with state sell order and mapped by partner_id, this returns the partners list from the sale order

The method used to sort records into a specific condition

self. env[‘res. partner’].sorted(key=lambda r: r.name)

It sorts the above example partner records into the name

Method decorators in Odoo

  ORM Methods in Odoo have different decorators. This decorator changes the behavior of methods.

• depends(arguments)
• constraints(arguments)
• on change(arguments)

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