refactor(member): drop email column

* remove email column
* update controller methods
* add patch to add value from email to email_id

erpnext/non_profit/doctype/member/member.json

@@ -12,7 +12,6 @@
   "membership_expiry_date",
   "column_break_5",
   "membership_type",
-  "email",
   "email_id",
   "image",
   "customer_section",
@@ -64,13 +63,6 @@
    "options": "Membership Type",
    "reqd": 1
   },
-  {
-   "fieldname": "email",
-   "fieldtype": "Link",
-   "in_list_view": 1,
-   "label": "User",
-   "options": "User"
-  },
   {
    "fieldname": "image",
    "fieldtype": "Attach Image",
@@ -178,7 +170,7 @@
  ],
  "image_field": "image",
  "links": [],
- "modified": "2020-09-16 23:44:13.596948",
+ "modified": "2020-11-09 12:12:10.174647",
  "modified_by": "Administrator",
  "module": "Non Profit",
  "name": "Member",

erpnext/non_profit/doctype/membership/membership.py

@@ -24,7 +24,7 @@ class Membership(Document):
 				user = frappe.get_doc('User', frappe.session.user)
 				member = frappe.get_doc(dict(
 					doctype='Member',
-					email=frappe.session.user,
+					email_id=frappe.session.user,
 					membership_type=self.membership_type,
 					member_name=user.get_fullname()
 				)).insert(ignore_permissions=True)
@@ -97,8 +97,12 @@ class Membership(Document):
 			frappe.throw(_("You need to enable <b>Send Acknowledge Email</b> in Membership Settings"))
 
 		member = frappe.get_doc("Member", self.member)
+		
+		if not member.email_id:
+			frappe.throw(_("Email address of member {0} is missing").format(frappe.utils.get_link_to_form("Member", self.member)))
+
 		plan = frappe.get_doc("Membership Type", self.membership_type)
-		email = member.email_id if member.email_id else member.email
+		email = member.email_id
 		attachments = [frappe.attach_print("Membership", self.name, print_format=settings.membership_print_format)]
 
 		if self.invoice and settings.send_invoice: