all uids ar integers

Database/sqlsetup.py

         tables = []
 
         default_columns = [
-            {"name":"uid",          "type":"VARCHAR(50)", "extra":{"foreignkey":"uids.uid", "nullable":False, "primarykey":True}},
+            {"name":"uid",          "type":"INTEGER", "extra":{"foreignkey":"uids.uid", "nullable":False, "primarykey":True}},
             {"name":"name",         "type":"VARCHAR(50)", "extra":{"nullable":False, "unique":True}},
             {"name":"string",       "type":"TEXT"},
             {"name":"help",         "type":"TEXT"},
         # Table listing the types
         em_type = {"name":"em_type"}
         em_type['columns'] = default_columns + [
-            {"name":"class_id",     "type":"VARCHAR(50)", "extra":{"foreignkey":"em_class.uid", "nullable":False}},
+            {"name":"class_id",     "type":"INTEGER", "extra":{"foreignkey":"em_class.uid", "nullable":False}},
             {"name":"sortcolumn",   "type":"VARCHAR(50)", "extra":{"default":"rank"}},
             {"name":"icon",         "type":"INTEGER"},
         ]
         # relation between types: which type can be a child of another
         em_type_hierarchy = {"name":"em_type_hierarchy"}
         em_type_hierarchy['columns'] = [
-            {"name":"superior_id",    "type":"VARCHAR(50)", "extra":{"foreignkey":"em_type.uid", "nullable":False, "primarykey":True}},
-            {"name":"subordinate_id", "type":"VARCHAR(50)", "extra":{"foreignkey":"em_type.uid", "nullable":False, "primarykey":True}},
+            {"name":"superior_id",    "type":"INTEGER", "extra":{"foreignkey":"em_type.uid", "nullable":False, "primarykey":True}},
+            {"name":"subordinate_id", "type":"INTEGER", "extra":{"foreignkey":"em_type.uid", "nullable":False, "primarykey":True}},
             {"name":"nature",         "type":"VARCHAR(50)"},
         ]
         tables.append(em_type_hierarchy)
        # Table listing the fieldgroups of a class
         em_fieldgroup = {"name":"em_fieldgroup"}
         em_fieldgroup['columns'] = default_columns + [
-            {"name":"class_id",     "type":"VARCHAR(50)", "extra":{"foreignkey":"em_class.uid", "nullable":False}},
+            {"name":"class_id",     "type":"INTEGER", "extra":{"foreignkey":"em_class.uid", "nullable":False}},
         ]
         tables.append(em_fieldgroup)
 
         # Table listing the fields of a fieldgroup
         em_field = {"name":"em_field"}
         em_field['columns'] = default_columns + [
-            {"name":"fieldtype_id",   "type":"VARCHAR(50)", "extra":{"nullable":False}},
-            {"name":"fieldgroup_id",  "type":"VARCHAR(50)", "extra":{"foreignkey":"em_fieldgroup.uid", "nullable":False}},
-            {"name":"rel_to_type_id", "type":"VARCHAR(50)", "extra":{"foreignkey":"em_type.uid", "nullable":False}}, # if relational: type this field refer to
-            {"name":"rel_field_id",   "type":"VARCHAR(50)", "extra":{"foreignkey":"em_type.uid", "nullable":False}}, # if relational: field that specify the rel_to_type_id
+            {"name":"fieldtype",   "type":"VARCHAR(50)", "extra":{"nullable":False}},
+            {"name":"fieldgroup_id",  "type":"INTEGER", "extra":{"foreignkey":"em_fieldgroup.uid", "nullable":False}},
+            {"name":"rel_to_type_id", "type":"INTEGER", "extra":{"foreignkey":"em_type.uid", "nullable":False}}, # if relational: type this field refer to
+            {"name":"rel_field_id",   "type":"INTEGER", "extra":{"foreignkey":"em_type.uid", "nullable":False}}, # if relational: field that specify the rel_to_type_id
             {"name":"optional",       "type":"BOOLEAN"},
             {"name":"internal",       "type":"BOOLEAN"},
             {"name":"icon",           "type":"INTEGER"},
         # selected field for each type
         em_field_type = {"name":"em_field_type"}
         em_field_type['columns'] = [
-            {"name":"type_id",   "type":"VARCHAR(50)", "extra":{"foreignkey":"em_type.uid", "nullable":False, "primarykey":True}},
-            {"name":"field_id",  "type":"VARCHAR(50)", "extra":{"foreignkey":"em_field.uid", "nullable":False, "primarykey":True}},
+            {"name":"type_id",   "type":"INTEGER", "extra":{"foreignkey":"em_type.uid", "nullable":False, "primarykey":True}},
+            {"name":"field_id",  "type":"INTEGER", "extra":{"foreignkey":"em_field.uid", "nullable":False, "primarykey":True}},
         ]
         tables.append(em_field_type)
 
         objects = {
             "name":"objects",
             "columns":[
-                {"name":"uid",         "type":"VARCHAR(50)", "extra":{"foreignkey":"uids.uid", "nullable":False, "primarykey":True}},
+                {"name":"uid",         "type":"INTEGER", "extra":{"foreignkey":"uids.uid", "nullable":False, "primarykey":True}},
                 {"name":"string",      "type":"VARCHAR(50)"},
-                {"name":"class_id",    "type":"VARCHAR(50)", "extra":{"foreignkey":"em_class.uid"}},
-                {"name":"type_id",     "type":"VARCHAR(50)", "extra":{"foreignkey":"em_type.uid"}},
+                {"name":"class_id",    "type":"INTEGER", "extra":{"foreignkey":"em_class.uid"}},
+                {"name":"type_id",     "type":"INTEGER", "extra":{"foreignkey":"em_type.uid"}},
                 {"name":"date_update", "type":"DATE"},
                 {"name":"date_create", "type":"DATE"},
                 {"name":"history",     "type":"TEXT"}
         files = {
             "name":"files",
             "columns":[
-                {"name":"uid",     "type":"VARCHAR(50)", "extra":{"foreignkey":"uids.uid", "nullable":False, "primarykey":True}},
+                {"name":"uid",     "type":"INTEGER", "extra":{"foreignkey":"uids.uid", "nullable":False, "primarykey":True}},
                 {"name":"field1",  "type":"VARCHAR(50)"}
             ]
         }