Dear all,

I created a new module which adds fields to the project and task form view. However, once I install the module and get an instant warning message "The record has been modified, your changes will be discarded. Do you want to proceed?" when I open project settings or create a new task using the "Create" button. This does not occur when creating a from Kanban view.

I have no idea what could cause this behavior.

Please find my code below. I would be great if you could help me out.

models.py

class TaskTemplating(models.Model):
    _inherit = 'project.project'

    color_gantt = fields.Char(string="Balkenfarbe", widget="colorpicker")

    color_gantt_set = fields.Boolean(string="Zeige Ganttfarbe", default=True)

    on_gantt = fields.Boolean(string="Bezeichnung in Gantt-Ansicht",
                              default=True)

    tag_ids = fields.Many2many('project.tags',
                               string="Stichwörter")


class DescriptionTemplate(models.Model):
    _inherit = 'project.task'

    desc_template_id = fields.Many2one('project.task.description_template_texts',
                                       string="Beschreibungsvorlagen")

    content = fields.Html('Vorlagen',
                            related='desc_template_id.content',
                            store=False)

    category = fields.Selection(
        string="Projektkategorie",
        related="project_id.x_category",
        store=False)

    @api.onchange('desc_template_id')
    def _set_desc_template(self):
        if not self.description:
            self.description = self.content

    @api.model
    def default_get(self, vals):
        task = super(DescriptionTemplate, self).default_get(vals)
        project_id = self.env.context.get('default_project_id')
        project = self.env['project.project'].browse(project_id)
        project_tag_ids = project.tag_ids
        ids_list = project_tag_ids.ids
        task.update({
            'color_gantt' : project.color_gantt,
            'color_gantt_set' : project.color_gantt_set,
            'on_gantt' : project.on_gantt,
            'tag_ids' : [(6,0,ids_list)]
        })
        return task


class DescTempText(models.Model):
    _name = 'project.task.description_template_texts'

    name = fields.Char('Bezeichnung')

    content = fields.Html('Vorlagen')


views.xml

    <record model="ir.ui.view" id="edit_project_ganttaps_inherited">
      <field name="name">project.project_form</field>
      <field name="model">project.project</field>
      <field name="inherit_id" ref="project_native.edit_project_ganttaps_inherited"/>
      <field name="arch" type="xml">
        <xpath expr="//field[@name='detail_plan']" position='after'>
          <field name="on_gantt"/>
          <field name="color_gantt_set"/>
          <field name="color_gantt" widget="colorpicker"/>
        </xpath>
      </field>
    </record>

    <record model="ir.ui.view" id="edit_project_inherited">
      <field name="name">project.project_form</field>
      <field name="model">project.project</field>
      <field name="inherit_id" ref="project.edit_project"/>
      <field name="arch" type="xml">
        <xpath expr="//field[@name='user_id']" position='after'>
          <field name="tag_ids" widget="many2many_tags"/>
        </xpath>
      </field>
    </record>

    <record model="ir.ui.view" id="description_template_selector">
      <field name="name">project.task.form</field>
      <field name="model">project.task</field>
      <field name="inherit_id" ref="project.view_task_form2"/>
      <field name="arch" type="xml">
        <xpath expr="//field[@name='tag_ids']" position='after'>
          <field name="desc_template_id"/>
          <field name="content" invisible='1'/>
          <field name="category" invisible='1'/>
        </xpath>
      </field>
    </record>

    <record model="ir.ui.view" id="description_template_kanban">
      <field name="name">project.task.kanban</field>
      <field name="model">project.task</field>
      <field name="inherit_id" ref="project.view_task_kanban"/>
      <field name="arch" type="xml">
        <xpath expr="//field[@name='tag_ids']" position='after'>
          <field name="category" invisible='1'/>
        </xpath>
      </field>
    </record>


    <record model="ir.ui.view" id="project_kanban_tags">
      <field name="name">project.project.kanban</field>
      <field name="model">project.project</field>
      <field name="inherit_id" ref="project.view_project_kanban"/>
      <field name="arch" type="xml">
        <xpath expr="//div[@class='o_primary']" position='after'>
          <field name="tag_ids" widget="many2many_tags"/>
        </xpath>
      </field>
    </record>