Added first implementations of new data fields types

Lodel/leapi/datahandlers/data_fields/format.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+import warnings
+from .varchar import EmDataField as VarcharDataField
+
+
+class EmDataField(VarcharDataField):
+
+    help = 'Automatic string field, designed to use the str % operator to build its content'
+
+    ## @brief Build its content with a field list and a format string
+    # @param format_string str
+    # @param max_length int : the maximum length of the handled value
+    # @param field_list list : List of field to use
+    # @param **kwargs
+    def __init__(self, format_string, field_list, max_length, **kwargs):
+        self._field_list = field_list
+        self._format_string = format_string
+        super().__init__(internal='automatic', max_length=max_length)

Lodel/leapi/datahandlers/data_fields/pk.py

@@ -0,0 +1,3 @@
+# -*- coding: utf-8 -*-
+from .integer import EmDataField as IntegerDataField
+

Lodel/leapi/datahandlers/data_fields/uid.py

@@ -1,8 +1,8 @@
 # -*- coding: utf-8 -*-
-from .integer import EmDataField
+from .integer import EmDataField as IntegerDataField
 
 
-class EmDataField(EmDataField):
+class EmDataField(IntegerDataField):
 
     help = 'Fieldtype designed to handle editorial model UID'
 

Lodel/leapi/datahandlers/data_fields/varchar.py

@@ -0,0 +1,12 @@
+# -*- coding: utf-8 -*-
+from ..data_field import DataField
+
+
+class EmDataField(DataField):
+    help = 'Basic string (varchar) field. Default size is 64 characters'
+
+    ## @brief A string field
+    # @brief max_length int: The maximum length of this field
+    def __init__(self, max_length=64, **kwargs):
+        self.max_length = int(max_length)
+        super().__init__(**kwargs)