feat(spp_change_request_v2): add dynamic approval-aware conflict & duplicate detection

spp_change_request_v2/models/change_request.py

@@ -133,6 +133,27 @@ def _compute_is_cr_manager(self):
     applied_by_id = fields.Many2one("res.users", readonly=True)
     apply_error = fields.Text(readonly=True)
 
+    # ══════════════════════════════════════════════════════════════════════════
+    # DYNAMIC APPROVAL
+    # ══════════════════════════════════════════════════════════════════════════
+
+    selected_field_name = fields.Char(
+        string="Field Being Modified",
+        readonly=True,
+        help="The detail field selected for modification (set when detail is saved). "
+        "Used by CEL conditions to determine the approval workflow.",
+    )
+    selected_field_old_value = fields.Char(
+        string="Old Value",
+        readonly=True,
+        help="Human-readable old value of the selected field (from registrant). Stored for audit trail.",
+    )
+    selected_field_new_value = fields.Char(
+        string="New Value",
+        readonly=True,
+        help="Human-readable new value of the selected field (from detail). Stored for audit trail.",
+    )
+
     # ══════════════════════════════════════════════════════════════════════════
     # LOG
     # ══════════════════════════════════════════════════════════════════════════
@@ -596,7 +617,11 @@ def create(self, vals_list):
             record._create_audit_event("created", None, "draft")
             record._create_log("created")
             # Run conflict detection after creation
-            if hasattr(record, "_run_conflict_checks"):
+            # Skip for dynamic approval — field_to_modify isn't set yet at create time.
+            # Checks run when selected_field_name is written (see conflict model's write()).
+            if hasattr(record, "_run_conflict_checks") and not (
+                record.request_type_id and record.request_type_id.use_dynamic_approval
+            ):
                 record._run_conflict_checks()
         return records
 
@@ -813,17 +838,137 @@ def action_submit_for_approval(self):
 
     def _get_approval_definition(self):
         self.ensure_one()
-        definition = self.request_type_id.approval_definition_id
+        cr_type = self.request_type_id
+
+        # Dynamic approval: evaluate candidates using selected field + values
+        if cr_type.use_dynamic_approval and cr_type.candidate_definition_ids:
+            definition = self._resolve_dynamic_approval()
+            if definition:
+                return definition
+
+        # Fallback to static definition (existing behavior)
+        definition = cr_type.approval_definition_id
         if not definition:
             raise UserError(
                 _(
                     "No approval workflow configured for request type '%s'. "
-                    "Please configure an approval definition in Change Request > Configuration > CR Types."
+                    "Please configure an approval definition in Change Request > "
+                    "Configuration > CR Types."
                 )
-                % self.request_type_id.name
+                % cr_type.name
             )
         return definition
 
+    def _resolve_dynamic_approval(self):
+        """Evaluate candidate definitions against selected field and values.
+
+        Iterates candidates in sequence order; first match wins.
+        Returns spp.approval.definition record, or None if no candidate matches.
+        """
+        self.ensure_one()
+
+        if not self.selected_field_name:
+            return None
+
+        extra_context = self._compute_field_values_for_cel()
+        evaluator = self.env["spp.cel.evaluator"]
+
+        for candidate in self.request_type_id.candidate_definition_ids.sorted("sequence"):
+            if not candidate.use_cel_condition or not candidate.cel_condition:
+                # No condition = catch-all (matches everything)
+                return candidate
+            try:
+                result = evaluator.evaluate(candidate.cel_condition, self, extra_context)
+                if result:
+                    return candidate
+            except Exception:
+                _logger.warning(
+                    "CEL evaluation failed for candidate definition '%s' on CR %s, skipping",
+                    candidate.name,
+                    self.name,
+                    exc_info=True,
+                )
+                continue
+
+        return None
+
+    def _compute_field_values_for_cel(self):
+        """Compute typed old and new values for CEL evaluation.
+
+        Returns a dict with old_value and new_value typed according to field type.
+        """
+        self.ensure_one()
+        field_name = self.selected_field_name
+        cr_type = self.request_type_id
+
+        if not field_name:
+            return {"old_value": None, "new_value": None}
+
+        mapping = cr_type.apply_mapping_ids.filtered(lambda m: m.source_field == field_name)[:1]
+
+        detail = self.get_detail()
+        registrant = self.registrant_id
+
+        old_raw = None
+        new_raw = None
+
+        if mapping and registrant:
+            old_raw = getattr(registrant, mapping.target_field, None)
+        if detail:
+            new_raw = getattr(detail, field_name, None)
+
+        return {
+            "old_value": self._normalize_value_for_cel(old_raw, registrant, mapping.target_field if mapping else None),
+            "new_value": self._normalize_value_for_cel(new_raw, detail, field_name),
+        }
+
+    def _normalize_value_for_cel(self, value, record, field_name):
+        """Normalize an Odoo field value for use in CEL expressions."""
+        if value is None or value is False:
+            if record and field_name and field_name in record._fields:
+                field = record._fields[field_name]
+                if field.type == "boolean":
+                    return False
+                if field.type in ("integer", "float", "monetary"):
+                    return 0
+            return None
+
+        if record and field_name and field_name in record._fields:
+            field = record._fields[field_name]
+            if field.type in ("char", "text", "selection", "html"):
+                return value or ""
+            if field.type in ("integer", "float", "monetary"):
+                return value or 0
+            if field.type == "boolean":
+                return bool(value)
+            if field.type in ("date", "datetime"):
+                return value
+            if field.type == "many2one":
+                # IDs are exposed for internal CEL evaluation only, not for external APIs.
+                result = {
+                    "id": value.id if value else 0,
+                    "name": value.display_name if value else "",
+                }
+                # Vocabulary models: expose machine-readable code for stable CEL matching
+                if value and "code" in value._fields:
+                    result["code"] = value.code or ""
+                # Hierarchical vocabularies: expose parent category
+                if value and "parent_id" in value._fields and value.parent_id:
+                    parent = value.parent_id
+                    result["parent"] = {
+                        "id": parent.id,
+                        "name": parent.display_name,
+                        "code": parent.code if "code" in parent._fields else "",
+                    }
+                return result
+            if field.type in ("one2many", "many2many"):
+                return {
+                    "ids": value.ids if value else [],
+                    "count": len(value) if value else 0,
+                }
+
+        return value
+
     def _on_approve(self):
         super()._on_approve()
         # Signal ORM that approval_state changed (set via raw SQL in _do_approve)
@@ -840,10 +985,19 @@ def _on_reject(self, reason):
         self._create_log("rejected", notes=reason)
 
     def _check_can_submit(self):
-        """Override to allow resubmission from revision state."""
+        """Override to allow resubmission and validate dynamic approval field selection."""
         self.ensure_one()
         if self.approval_state not in ("draft", "revision"):
             raise UserError(_("Only draft or revision-requested records can be submitted for approval."))
+        cr_type = self.request_type_id
+        if cr_type.use_dynamic_approval and not self.selected_field_name:
+            raise ValidationError(
+                _(
+                    "Please select a field to modify on the detail form before "
+                    "submitting for approval. This CR type requires a single "
+                    "field selection for dynamic approval routing."
+                )
+            )
 
     def _on_submit(self):
         # Run conflict checks before submission

spp_change_request_v2/models/change_request_conflict.py

@@ -26,10 +26,14 @@ def create(self, vals_list):
         records = super().create(vals_list)
 
         for record in records:
-            # Run conflict checks if enabled for this CR type
+            # Run conflict checks if enabled for this CR type.
+            # Skip for dynamic approval — field_to_modify isn't set yet.
+            # Checks run when selected_field_name is set (see write() trigger).
             if record.request_type_id and (
                 record.request_type_id.enable_conflict_detection or record.request_type_id.enable_duplicate_detection
             ):
+                if record.request_type_id.use_dynamic_approval:
+                    continue
                 try:
                     record._run_conflict_checks()
                 except Exception as e:
@@ -47,8 +51,9 @@ def write(self, vals):
         """Re-run conflict detection if relevant fields change."""
         result = super().write(vals)
 
-        # Re-check conflicts if registrant or type changed
-        if "registrant_id" in vals or "request_type_id" in vals:
+        # Re-check conflicts if registrant, type, or selected field changed
+        trigger_fields = {"registrant_id", "request_type_id", "selected_field_name"}
+        if trigger_fields & set(vals):
             for record in self:
                 if (
                     record.request_type_id

spp_change_request_v2/models/change_request_detail_base.py

@@ -53,6 +53,44 @@ def _compute_is_cr_manager(self):
     stage = fields.Selection(
         related="change_request_id.stage",
     )
+    use_dynamic_approval = fields.Boolean(
+        related="change_request_id.request_type_id.use_dynamic_approval",
+    )
+    field_to_modify = fields.Selection(
+        selection="_get_field_to_modify_selection",
+        string="Field to Modify",
+        help="Select which field to update in this change request",
+    )
+
+    @api.model
+    def _get_field_to_modify_selection(self):
+        """Return available field options for field-level change requests.
+
+        Override in concrete detail models to provide the list of modifiable fields.
+        Returns a list of (value, label) tuples, e.g.:
+            [("poverty_status_id", "Poverty Status"), ("set_group_id", "Set Group")]
+        """
+        return []
+
+    def write(self, vals):
+        result = super().write(vals)
+        if "field_to_modify" in vals:
+            for rec in self:
+                if rec.change_request_id:
+                    rec._sync_field_to_modify()
+        else:
+            for rec in self:
+                if rec.field_to_modify and rec.field_to_modify in vals and rec.change_request_id:
+                    rec._sync_field_to_modify()
+        return result
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        records = super().create(vals_list)
+        for rec in records:
+            if rec.field_to_modify and rec.change_request_id:
+                rec._sync_field_to_modify()
+        return records
 
     def action_proceed_to_cr(self):
         """Navigate to the parent Change Request form if there are proposed changes."""
@@ -120,6 +158,52 @@ def action_request_revision(self):
         self.ensure_one()
         return self.change_request_id.action_request_revision()
 
+    # ══════════════════════════════════════════════════════════════════════════
+    # DYNAMIC APPROVAL SYNC
+    # ══════════════════════════════════════════════════════════════════════════
+
+    def _sync_field_to_modify(self):
+        """Sync field_to_modify and its old/new values to the parent CR."""
+        self.ensure_one()
+        cr = self.change_request_id
+        if not cr:
+            return
+        # Only sync for dynamic-approval CR types
+        if not cr.request_type_id.use_dynamic_approval:
+            return
+
+        field_name = self.field_to_modify
+        cr_vals = {
+            "selected_field_name": field_name,
+            "selected_field_old_value": False,
+            "selected_field_new_value": False,
+        }
+
+        if field_name:
+            mapping = cr.request_type_id.apply_mapping_ids.filtered(lambda m: m.source_field == field_name)[:1]
+
+            if mapping:
+                registrant = cr.registrant_id
+                old_raw = getattr(registrant, mapping.target_field, None)
+                cr_vals["selected_field_old_value"] = self._format_value_for_display(old_raw)
+
+            new_raw = getattr(self, field_name, None)
+            cr_vals["selected_field_new_value"] = self._format_value_for_display(new_raw)
+
+        cr.write(cr_vals)
+
+    def _format_value_for_display(self, value):
+        """Format a field value as a human-readable string for audit display."""
+        # Boolean check MUST come before the falsy check,
+        # otherwise False displays as "" instead of "No"
+        if isinstance(value, bool):
+            return _("Yes") if value else _("No")
+        if value is None or value is False:
+            return ""
+        if hasattr(value, "display_name"):
+            return value.display_name or ""
+        return str(value)
+
     # ══════════════════════════════════════════════════════════════════════════
     # PREFILL FROM REGISTRANT
     # ══════════════════════════════════════════════════════════════════════════

spp_change_request_v2/models/change_request_type.py

@@ -201,6 +201,21 @@ def _onchange_available_document_ids(self):
         string="Approval Workflow",
     )
     auto_approve_from_event = fields.Boolean(default=False)
+    use_dynamic_approval = fields.Boolean(
+        string="Dynamic Approval",
+        default=False,
+        help="When enabled, user selects a single field to modify per CR. "
+        "The selected field determines which approval workflow applies.",
+    )
+    candidate_definition_ids = fields.Many2many(
+        "spp.approval.definition",
+        "cr_type_candidate_definition_rel",
+        "type_id",
+        "definition_id",
+        string="Candidate Approval Definitions",
+        help="Evaluated in sequence order; first matching CEL condition wins. "
+        "If none match, the default Approval Workflow is used.",
+    )
 
     # ══════════════════════════════════════════════════════════════════════════
     # CONFLICT DETECTION