Resolve "configurable study fields"

Closes #339 (closed)

@carlos.vega

The changes can be summorized as follow:

• study configuration allows to add custom field to StudySubject.
• every StudySubject has set of values for custom fields in the study
• custom field can be of following type: text, integer, double, boolean, date, select from predefined list, file
• StudySubject files are uploaded to separate folder defined in local_settings.py - this folder should not be accessed by WhiteNoise/nginx/apache - there is upload_files view that allows to download content of the file if user is authenticated
• custom field can be marked as read-only, obligatory, unique (in a study)
• custom field can have default value defined
• urls for adding new subject, exporting subjects, fetching data about subject from API contain study_id - this was required for newly implemented tests

smash/web/api_views/serialization_utils.py

@@ -3,14 +3,14 @@ import logging
 logger = logging.getLogger(__name__)
 
 
-def bool_to_yes_no(val):
+def bool_to_yes_no(val: bool):
     if val:
         return "YES"
     else:
         return "NO"
 
 
-def bool_to_yes_no_null(val):
+def bool_to_yes_no_null(val: bool):
     if val is None:
         return "N/A"
     if val:
@@ -19,6 +19,21 @@ def bool_to_yes_no_null(val):
         return "NO"
 
 
+def str_to_yes_no(val: str):
+    if val.lower() == 'true':
+        return "YES"
+    else:
+        return "NO"
+
+def str_to_yes_no_null(val: str):
+    if val is None:
+        return None
+    if val.lower() == 'true':
+        return "YES"
+    else:
+        return "NO"
+
+
 def virus_test_to_str(test, date):
     if test is None and date is not None:
         return "Inconclusive"
@@ -60,7 +75,7 @@ def serialize_datetime(date):
     return result
 
 
-def add_column(result, name, field_name, column_list, param, columns_used_in_study=None, visible_param=None,
+def add_column(result, name, field_name, column_list, param_filter, columns_used_in_study=None, visible_param=None,
                sortable=True, add_param=True):
     add = add_param
     if columns_used_in_study:
@@ -75,7 +90,7 @@ def add_column(result, name, field_name, column_list, param, columns_used_in_stu
         result.append({
             "type": field_name,
             "name": name,
-            "filter": param,
+            "filter": param_filter,
             "visible": visible,
             "sortable": sortable
         })