feat: added ability to find the batch of a student

Added the course field and member_email fields to LMS Batch Membership
to allow the possibility of querying if a user is a student of a course.

Closes #101

community/lms/doctype/lms_batch_membership/lms_batch_membership.json

@@ -6,11 +6,13 @@
  "engine": "InnoDB",
  "field_order": [
   "batch",
-  "role",
-  "column_break_3",
   "member",
   "member_name",
-  "member_type"
+  "member_email",
+  "column_break_3",
+  "course",
+  "member_type",
+  "role"
  ],
  "fields": [
   {
@@ -30,6 +32,7 @@
    "options": "Community Member"
   },
   {
+   "default": "Student",
    "fieldname": "member_type",
    "fieldtype": "Select",
    "in_list_view": 1,
@@ -37,6 +40,7 @@
    "options": "\nStudent\nMentor\nStaff"
   },
   {
+   "default": "Member",
    "fieldname": "role",
    "fieldtype": "Select",
    "in_standard_filter": 1,
@@ -54,11 +58,28 @@
   {
    "fieldname": "column_break_3",
    "fieldtype": "Column Break"
+  },
+  {
+   "fetch_from": "member.email",
+   "fieldname": "member_email",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "Member Email",
+   "read_only": 1,
+   "read_only_depends_on": "member.email"
+  },
+  {
+   "fetch_from": "batch.course",
+   "fieldname": "course",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "Course",
+   "read_only": 1
   }
  ],
  "index_web_pages_for_search": 1,
  "links": [],
- "modified": "2021-04-26 12:52:59.826509",
+ "modified": "2021-05-24 09:32:04.128620",
  "modified_by": "Administrator",
  "module": "LMS",
  "name": "LMS Batch Membership",

community/lms/doctype/lms_course/lms_course.py

@@ -109,28 +109,17 @@ class LMSCourse(Document):
         Returns None if the student is not part of any batch.
         """
         if not email:
-            return False
-        member = self.get_community_member(email)
-        result = frappe.db.get_all(
-            "LMS Batch Membership",
-            filters={
-                "member": member,
-                "member_type": "Student",
-            },
-            fields=['batch']
-        )
-        batches = [row['batch'] for row in result]
+            return
 
-        # filter the batches that are for this course
-        result = frappe.db.get_all(
-            "LMS Batch",
+        batch_name = frappe.get_value(
+            doctype="LMS Batch Membership",
             filters={
                 "course": self.name,
-                "name": ["IN", batches]
-            })
-        batches = [row['name'] for row in result]
-        if batches:
-            return frappe.get_doc("LMS Batch", batches[0])
+                "member_type": "Student",
+                "member_email": email
+            },
+            fieldname="batch")
+        return batch_name and frappe.get_doc("LMS Batch", batch_name)
 
     def get_instructor(self):
         member_name = self.get_community_member(self.owner)