[NEW] Add budget model funcitonnalities

User is able to generate budget model and model lines
User can reset a budget and generate one using an existing model

account_budget_forecast/models/__init__.py

@@ -4,6 +4,7 @@ from . import account_analytic_account
 from . import account_analytic_line
 from . import account_move
 from . import budget_forecast
+from . import budget_forecast_model
 from . import sale_order
 from . import product
 from . import project

account_budget_forecast/models/budget_forecast.py

@@ -16,7 +16,6 @@ class BudgetForecast(models.Model):
         "account.analytic.account",
         "Analytic Account",
         required=True,
-        ondelete="restrict",
         index=True,
         copy=True,
     )
@@ -138,25 +137,24 @@ class BudgetForecast(models.Model):
         parent_ids = self.mapped("parent_id")
         if not child_unlink:
             for record in self:
-                if not record.is_summary and (
-                    record.display_type
-                    in [
-                        "line_section",
-                        "line_subsection",
-                    ]
-                ):
-                    # find similar section/sub_section lines
-                    lines = record.env["budget.forecast"].search(
-                        [
+                if record.display_type in [
+                    "line_section",
+                    "line_subsection",
+                ]:
+                    if record.is_summary:
+                        domain = [("summary_id", "=", record.id)]
+                    else:
+                        domain = [
+                            ("id", "!=", record.id),
                             "|",
                             ("summary_id", "=", record.summary_id.id),
                             ("id", "=", record.summary_id.id),
                         ]
-                    )
+                    # find similar section/sub_section lines
+                    lines = record.env["budget.forecast"].search(domain)
                     for line in lines:
                         line.unlink(True)
         res = super(BudgetForecast, self).unlink()
-        parent_ids.exists()._calc_plan()
         return res
 
     @api.onchange("product_id")

account_budget_forecast/models/budget_forecast_model.py

@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+
+from odoo import models, fields, api, _
+
+
+class BudgetForecastModel(models.Model):
+    _name = "budget.forecast.model"
+    _description = _name
+
+    name = fields.Char("Name", copy=False)
+
+
+class BudgetForecastModelLine(models.Model):
+    _name = "budget.forecast.model.line"
+    _description = _name
+
+    budget_model = fields.Many2one("budget.forecast.model", copy=True)
+
+    name = fields.Char("Name", copy=True)
+
+    display_type = fields.Selection(
+        [
+            ("line_section", "Section"),
+            ("line_subsection", "Sub-Section"),
+        ],
+        copy=True,
+        store=True,
+    )
+    product_id = fields.Many2one(
+        "product.product", copy=True, domain="[('budget_level', '=', display_type)]"
+    )
+    parent_id = fields.Many2one(
+        "budget.forecast.model.line",
+        store=True,
+        copy=False,
+    )
+    child_ids = fields.One2many("budget.forecast.model.line", "parent_id", copy=False)