Add a new fieldtype to handles EM uid

EditorialModel/fieldtypes/emuid.py

@@ -0,0 +1,37 @@
+#-*- coding: utf-8 -*-
+
+import leapi.lecrud as lecrud
+import leapi.letype as letype
+
+from .generic import FieldTypeError
+from . import integer
+
+class EmFieldType(integer.EmFieldType):
+    
+    help = 'Fieldtypes designed to handle editorial model UID for LeObjects'
+
+    def __init__(self, id_class=True, **kwargs):
+        kwargs['internal'] = 'automatic'
+        super(EmFieldType, self).__init__(id_class = id_class, **kwargs)
+
+    def _check_data_value(self, value):
+        if not( value is None):
+            return ValueError("Cannot set this value. Only None is authorized")
+
+    def construct_data(self, lec, fname, datas):
+        if isinstance(lec, letype._LeType):
+            # if None try to fetch data from lec itself
+            fname[datas] = lec.em_uid()[ 0 if self.class_id else 1]
+        else:
+            raise RuntimeError("The LeObject is not a LeType")
+    
+    def check_data_consistency(self, lec, fname, datas):
+        if isinstance(lec, lecrud._LeCrud) and lec.implements_letype():
+            if datas[fname] != (lec._class_id if self.class_id else lec._type_id):
+                return FieldTypeError("Given Editorial model uid doesn't fit with given LeObject")
+        else:
+            return FieldTypeError("You have to give a LeType !!!")
+                
+            
+        
+