Added can_override method to the data_handler types

lodel/leapi/datahandlers/data_fields/bool.py

@@ -5,7 +5,7 @@ from ..data_field import DataField
 class DataHandler(DataField):
 
     help = 'A basic boolean field'
-    ftype = 'bool'
+    base_type = 'bool'
 
     ## @brief A boolean field
     def __init__(self, **kwargs):
@@ -20,3 +20,10 @@ class DataHandler(DataField):
         except(ValueError, TypeError):
             error = TypeError("The value '%s' is not, and will never, be a boolean" % value)
         return (value, error)
+
+    def can_override(self, data_handler):
+
+        if data_handler.__class__.base_type != self.__class__.base_type:
+            return False
+
+        return True

lodel/leapi/datahandlers/data_fields/datetime.py

@@ -5,6 +5,7 @@ from ..data_field import DataField
 class DataHandler(DataField):
 
     help = 'A datetime field. Take two boolean options now_on_update and now_on_create'
+    base_type = 'datetime'
 
     ## @brief A datetime field
     # @param now_on_update bool : If true, the date is set to NOW on update
@@ -14,3 +15,10 @@ class DataHandler(DataField):
         self.now_on_update = now_on_update
         self.now_on_create = now_on_create
         super().__init__(**kwargs)
+
+    def can_override(self, data_handler):
+
+        if data_handler.__class__.base_type != self.__class__.base_type:
+            return False
+
+        return True

lodel/leapi/datahandlers/data_fields/file.py

@@ -4,9 +4,16 @@ from ..data_field import DataField
 
 class DataHandler(DataField):
 
+    base_type = 'file'
+
     ## @brief a file field
     # @param upload_path str : None by default
     # @param **kwargs
     def __init__(self, upload_path=None, **kwargs):
         self.upload_path = upload_path
         super().__init__(ftype='file', **kwargs)
+
+    def can_override(self, data_handler):
+        if data_handler.__class__.base_type != self.__class__.base_type:
+            return False
+        return True

lodel/leapi/datahandlers/data_fields/format.py

@@ -6,6 +6,7 @@ from .varchar import EmDataField as VarcharDataField
 class DataHandler(VarcharDataField):
 
     help = 'Automatic string field, designed to use the str % operator to build its content'
+    base_type = 'char'
 
     ## @brief Build its content with a field list and a format string
     # @param format_string str
@@ -16,3 +17,11 @@ class DataHandler(VarcharDataField):
         self._field_list = field_list
         self._format_string = format_string
         super().__init__(internal='automatic', max_length=max_length)
+
+    def can_override(self, data_handler):
+        if data_handler.__class__.base_type != self.__class__.base_type:
+            return False
+        if data_handler.max_length != self.max_length:
+            return False
+
+        return True

lodel/leapi/datahandlers/data_fields/integer.py

@@ -1,14 +1,14 @@
 # -*- coding: utf-8 -*-
-from ..data_field import DataField
+from ..data_field import FieldDataHandler
 
 
-class DataHandler(DataField):
+class DataHandler(FieldDataHandler):
 
     help = 'Basic integer field'
-    ftype = 'int'
+    base_type = 'int'
 
     def __init__(self, **kwargs):
-        super().__init__(ftype='int', **kwargs)
+        super().__init__(base_type='int', **kwargs)
 
     def _check_data_value(self, value):
         error = None
@@ -17,3 +17,8 @@ class DataHandler(DataField):
         except(ValueError, TypeError):
             error = TypeError("The value '%s' is not, and will never, be an integer" % value)
         return (value, error)
+
+    def can_override(self, data_handler):
+        if data_handler.__class__.base_type != self.__class__.base_type:
+            return False
+        return True

lodel/leapi/datahandlers/data_fields/regexvarchar.py

@@ -6,6 +6,7 @@ from .varchar import EmDataField as VarcharDataField
 class DataHandler(VarcharDataField):
 
     help = 'String field validated with a regex. Takes two options : max_length and regex'
+    base_type = 'char'
 
     ## @brief A string field validated by a regex
     # @param regex str : a regex string (passed as argument to re.compile())
@@ -23,3 +24,10 @@ class DataHandler(VarcharDataField):
             value = ''
             error = TypeError('"%s" doesn\'t match the regex "%s"' % (value, self.regex))
         return (value, error)
+
+    def can_override(self, data_handler):
+        if data_handler.__class__.base_type != self.__class__.base_type:
+            return False
+        if data_handler.max_length != self.max_length:
+            return False
+        return True

lodel/leapi/datahandlers/data_fields/text.py

@@ -12,4 +12,11 @@ class DataHandler(DataField):
     def can_override(self, data_handler):
         if data_handler.__class__.base_type != self.__class__.base_type:
             return False
-        return True
+        return True
+
+    def can_override(self, data_handler):
+
+        if data_handler.__class__.base_type != self.__class__.base_type:
+            return False
+
+        return True