Hi,

Try the following code.

@api.model

def _get_view(self, view_id=None, view_type='form', **options):

    arch, view = super()._get_view(view_id=view_id, view_type=view_type, **options)

    # Get frontend context from options if available

    ctx = options.get('context') or self._context

    if view_type == 'form' and ctx.get('mi_gestion'):

        m2o_fields = [name for name, field in self._fields.items() if field.type == 'many2one']

        if m2o_fields:

            xpath_query = " | ".join(f".//field[@name='{name}']" for name in m2o_fields)

            nodes = arch.xpath(xpath_query)

            self._modify_m2o_field_option(nodes)

    return arch, view

Alternate method.

* Use fields_view_get instead of _get_view

        -Most customizations of views in Odoo are done by overriding fields_view_get.

                - This method always has access to the full context (frontend’s context is propagated properly).

Example:

@api.model

def fields_view_get(self, view_id=None, view_type='form', toolbar=False, submenu=False):

    res = super().fields_view_get(view_id=view_id, view_type=view_type, toolbar=toolbar, submenu=submenu)

    if view_type == 'form' and self._context.get('mi_gestion'):

        doc = etree.XML(res['arch'])

        m2o_fields = [name for name, field in self._fields.items() if field.type == 'many2one']

        if m2o_fields:

            xpath_query = " | ".join(f".//field[@name='{name}']" for name in m2o_fields)

            nodes = doc.xpath(xpath_query)

            self._modify_m2o_field_option(nodes)

            res['arch'] = etree.tostring(doc, encoding='unicode')

    return res

This is more standard and reliable than _get_view.

Hope it helps.

Hii,

Fix your code like this:

@api.model
def _get_view(self, view_id=None, view_type='form', **options):
    arch, view = super()._get_view(view_id=view_id, view_type=view_type, **options)

    context = options.get('context') or {}

    if view_type == 'form' and context.get('mi_gestion'):
        m2o_fields = [name for name, field in self._fields.items() if field.type == 'many2one']
        if m2o_fields:
            xpath_query = " | ".join(f".//field[@name='{name}']" for name in m2o_fields)
            nodes = arch.xpath(xpath_query)
            self._modify_m2o_field_option(nodes)

    return arch, view

Why self._context.get('mi_gestion') Fails

In Odoo, self._context is derived from self.env.context. But in _get_view(), self is often just the bare model class (env['your.model']), not a recordset, so it doesn't carry the dynamic context from the view request.

i hope it is use full