Import multiselection field as CSV list

Closes #13995
(grafted from b750eb7cfb864e10a081e20ac5b3449c591cd484)

--HG--
branch : 7.0

trytond/trytond/model/modelstorage.py

@@ -1016,6 +1016,16 @@ class ModelStorage(Model):
                 elif value:
                     return value
 
+            def convert_multiselection(value):
+                if isinstance(value, str) and value:
+                    return next(csv.reader(
+                            value.splitlines(),
+                            delimiter=',',
+                            quoting=csv.QUOTE_NONE,
+                            escapechar='\\'))
+                else:
+                    return value
+
             try:
                 return locals()['convert_%s' % ftype](value)
             except KeyError:

trytond/trytond/tests/import_data.py

@@ -69,6 +69,16 @@ class ImportDataSelection(ModelSQL):
             ], 'Selection')
 
 
+class ImportDataMultiSelection(ModelSQL):
+    "Import Data MultiSelection"
+    __name__ = 'test.import_data.multiselection'
+    multiselection = fields.MultiSelection([
+            ('select1', "Select 1"),
+            ('select2', "Select 2"),
+            ('select3', "Select 3"),
+            ], "MultiSelection")
+
+
 class ImportDataMany2OneTarget(ModelSQL):
     "Import Data Many2One Target"
     __name__ = 'test.import_data.many2one.target'
@@ -180,6 +190,7 @@ def register(module):
         ImportDataDateTime,
         ImportDataTimeDelta,
         ImportDataSelection,
+        ImportDataMultiSelection,
         ImportDataMany2OneTarget,
         ImportDataMany2One,
         ImportDataMany2ManyTarget,

trytond/trytond/tests/test_importdata.py

@@ -265,6 +265,28 @@ class ImportDataTestCase(unittest.TestCase):
             Selection.import_data(['selection'], [['select1'], ['select2']]),
             2)
 
+    @with_transaction()
+    def test_multiselection(self):
+        'Test multiselection'
+        pool = Pool()
+        MultiSelection = pool.get('test.import_data.multiselection')
+
+        for value in ['select1', 'select1,select2', '']:
+            with self.subTest(value=value):
+                self.assertEqual(
+                    MultiSelection.import_data(
+                        ['multiselection'], [[value]]), 1)
+
+    @with_transaction()
+    def test_multiselection_many_rows(self):
+        'Test multiselection many rows'
+        pool = Pool()
+        MultiSelection = pool.get('test.import_data.multiselection')
+
+        self.assertEqual(
+            MultiSelection.import_data(
+                ['multiselection'], [['select1'], ['select1,select2']]), 2)
+
     @with_transaction()
     def test_many2one(self):
         'Test many2one'