[FIX] mail: introduce findFromIdentifyingData

This is necessary to check the existence of a record based on identifying data
without having to use `insert` (or the inefficient `find`).

PR: #56243
Part of task-2323670

X-original-commit: c4bbfc5e2a8d236e5fc79a63c13575de146afbd7

addons/mail/static/src/model/model_manager.js

@@ -171,6 +171,20 @@ class ModelManager {
         return this.all(Model).find(findFunc);
     }
 
+    /**
+     * Gets the unique record of provided model that matches the given
+     * identifying data, if it exists.
+     * @see `_createRecordLocalId` for criteria of identification.
+     *
+     * @param {mail.model} Model class
+     * @param {Object} data
+     * @returns {mail.model|undefined}
+     */
+    findFromIdentifyingData(Model, data) {
+        const localId = Model._createRecordLocalId(data);
+        return Model.get(localId);
+    }
+
     /**
      * This method returns the record of provided model that matches provided
      * local id. Useful to convert a local id to a record.
@@ -785,8 +799,7 @@ class ModelManager {
         const dataList = isMulti ? data : [data];
         const records = [];
         for (const data of dataList) {
-            const localId = Model._createRecordLocalId(data);
-            let record = Model.get(localId);
+            let record = Model.findFromIdentifyingData(data);
             if (!record) {
                 record = this._create(Model, data);
             } else {

addons/mail/static/src/models/model/model.js

@@ -110,6 +110,19 @@ function factory() {
             return this.env.modelManager.find(this, findFunc);
         }
 
+        /**
+         * Gets the unique record that matches the given identifying data, if it
+         * exists.
+         * @see `_createRecordLocalId` for criteria of identification.
+         *
+         * @static
+         * @param {Object} data
+         * @returns {mail.model|undefined}
+         */
+        static findFromIdentifyingData(data) {
+            return this.env.modelManager.findFromIdentifyingData(this, data);
+        }
+
         /**
          * This method returns the record of this model that matches provided
          * local id. Useful to convert a local id to a record. Note that even