mirror of https://github.com/OCA/web.git
69 lines
2.5 KiB
ReStructuredText
69 lines
2.5 KiB
ReStructuredText
When you define a view you can specify on the relational fields a domain
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attribute. This attribute is evaluated as filter to apply when displaying
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existing records for selection.
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.. code-block:: xml
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<field name="product_id" domain="[('type','=','product')]"/>
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The value provided for the domain attribute must be a string representing a
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valid Odoo domain. This string is evaluated on the client side in a
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restricted context where we can reference as right operand the values of
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fields present into the form and a limited set of functions.
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In this context it's hard to build complex domain and we are facing to some
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limitations as:
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* The syntax to include in your domain a criteria involving values from a
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x2many field is complex.
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* The right side of domain in case of x2many can involve huge amount of ids
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(performance problem).
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* Domains computed by an onchange on an other field are not recomputed when
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you modify the form and don't modify the field triggering the onchange.
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* It's not possible to extend an existing domain. You must completely redefine
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the domain in your specialized addon
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* etc...
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In order to mitigate these limitations this new addon allows you to use the
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value of a field as domain of an other field in the xml definition of your
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view.
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.. code-block:: xml
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<field name="product_id_domain" invisible="1"/>
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<field name="product_id" domain="product_id_domain"/>
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The field used as domain must provide the domain as a JSON encoded string.
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.. code-block:: python
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product_id_domain = fields.Char(
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compute="_compute_product_id_domain",
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readonly=True,
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store=False,
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)
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@api.depends('name')
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def _compute_product_id_domain(self):
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for rec in self:
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rec.product_id_domain = json.dumps(
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[('type', '=', 'product'), ('name', 'like', rec.name)]
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)
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.. note::
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You do not actually need this module to craft a dynamic domain. Odoo comes
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with its own `py.js <https://github.com/odoo/odoo/tree/16.0/addons/web/static/lib/py.js>`_
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web library to parse expressions such as domains. `py.js` supports more
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complex expressions than just static lists.
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Here is an example of a conditional domain based on the value of another
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field:
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.. code-block:: python
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(order_id or partner_id) and [('id', 'in', allowed_picking_ids)]
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or [('state', '=', 'done'), ('picking_type_id.code', '=', 'outgoing')]
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For OCA modules, this method is preferred over adding this module as an
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additional dependency.
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