[FIX] doc: gantt view no longer support date_delay

Use date_stop instead, and remove the instruction to remove the computed
field.

closes odoo#45664

Signed-off-by: Denis Ledoux (dle) <[email protected]>

doc/howtos/backend.rst

@@ -1159,7 +1159,6 @@ their root element is ``<gantt>``.
 
     .. only:: solutions
 
-        #. Create a computed field expressing the session's duration in hours
         #. Add the gantt view's definition, and add the gantt view to the
            *Session* model's action
 

doc/howtos/backend/exercise-gantt

@@ -2,39 +2,10 @@
 # Parent dba00a105dd2a82490394b8dec5fea5f1d8847e1
 # Parent  f4374b6e2e661e0782e396b24c57c1eb97d13288
 
-diff --git a/openacademy/models.py b/openacademy/models.py
---- a/openacademy/models.py
-+++ b/openacademy/models.py
-@@ -61,6 +61,9 @@ class Session(models.Model):
-     end_date = fields.Date(string="End Date", store=True,
-         compute='_get_end_date', inverse='_set_end_date')
-
-+    hours = fields.Float(string="Duration in hours",
-+                         compute='_get_hours', inverse='_set_hours')
-+
-     @api.depends('seats', 'attendee_ids')
-     def _taken_seats(self):
-         for r in self:
-@@ -107,6 +110,15 @@ class Session(models.Model):
-             # so add one day to get 5 days instead
-             r.duration = (r.end_date - r.start_date).days + 1
-
-+    @api.depends('duration')
-+    def _get_hours(self):
-+        for r in self:
-+            r.hours = r.duration * 24
-+
-+    def _set_hours(self):
-+        for r in self:
-+            r.duration = r.hours / 24
-+
-     @api.constrains('instructor_id', 'attendee_ids')
-     def _check_instructor_not_in_attendees(self):
-         for r in self:
 diff --git a/openacademy/views/openacademy.xml b/openacademy/views/openacademy.xml
 --- a/openacademy/views/openacademy.xml
 +++ b/openacademy/views/openacademy.xml
-@@ -142,10 +142,22 @@
+@@ -142,10 +142,21 @@
              </field>
          </record>
 
@@ -43,9 +14,8 @@ diff --git a/openacademy/views/openacademy.xml b/openacademy/views/openacademy.x
 +            <field name="model">openacademy.session</field>
 +            <field name="arch" type="xml">
 +                <gantt string="Session Gantt"
-+                       date_start="start_date" date_delay="hours"
++                       date_start="start_date" date_stop="end_date"
 +                       default_group_by='instructor_id'>
-+                    <!-- <field name="name"/> this is not required after Odoo 10.0 -->
 +                </gantt>
 +            </field>
 +        </record>

doc/howtos/backend/exercise-graph

@@ -5,19 +5,19 @@
 diff --git a/openacademy/models.py b/openacademy/models.py
 --- a/openacademy/models.py
 +++ b/openacademy/models.py
-@@ -64,6 +64,9 @@ class Session(models.Model):
-     hours = fields.Float(string="Duration in hours",
-                          compute='_get_hours', inverse='_set_hours')
+@@ -60,6 +60,9 @@ class Session(models.Model):
+     end_date = fields.Date(string="End Date", store=True,
+         compute='_get_end_date', inverse='_set_end_date')
 
 +    attendees_count = fields.Integer(
 +        string="Attendees count", compute='_get_attendees_count', store=True)
 +
      @api.depends('seats', 'attendee_ids')
      def _taken_seats(self):
          for r in self:
-@@ -119,6 +122,11 @@ class Session(models.Model):
-         for r in self:
-             r.duration = r.hours / 24
+@@ -106,6 +109,11 @@ class Session(models.Model):
+             # so add one day to get 5 days instead
+             r.duration = (r.end_date - r.start_date).days + 1
 
 +    @api.depends('attendee_ids')
 +    def _get_attendees_count(self):
@@ -30,7 +30,7 @@ diff --git a/openacademy/models.py b/openacademy/models.py
 diff --git a/openacademy/views/openacademy.xml b/openacademy/views/openacademy.xml
 --- a/openacademy/views/openacademy.xml
 +++ b/openacademy/views/openacademy.xml
-@@ -154,10 +154,21 @@
+@@ -153,10 +153,21 @@
              </field>
          </record>