feat: add company links to Email Account and Communication (#49721)

Co-authored-by: barredterra <14891507+barredterra@users.noreply.github.com>

erpnext/patches.txt

@@ -261,6 +261,7 @@ execute:frappe.rename_doc("Report", "TDS Payable Monthly", "Tax Withholding Deta
 erpnext.patches.v14_0.update_proprietorship_to_individual
 erpnext.patches.v15_0.rename_subcontracting_fields
 erpnext.patches.v15_0.unset_incorrect_additional_discount_percentage
+erpnext.patches.v16_0.create_company_custom_fields
 
 [post_model_sync]
 erpnext.patches.v15_0.rename_gross_purchase_amount_to_net_purchase_amount

erpnext/patches/v16_0/create_company_custom_fields.py

@@ -0,0 +1,6 @@
+from erpnext.setup.install import create_custom_company_links
+
+
+def execute():
+	"""Add link fields to Company in Email Account and Communication."""
+	create_custom_company_links()

erpnext/setup/install.py

@@ -23,6 +23,7 @@ def after_install():
 	set_single_defaults()
 	create_print_setting_custom_fields()
 	create_marketgin_campagin_custom_fields()
+	create_custom_company_links()
 	add_all_roles_to("Administrator")
 	create_default_success_action()
 	create_incoterms()
@@ -139,6 +140,39 @@ def create_default_success_action():
 			doc.insert(ignore_permissions=True)
 
 
+def create_custom_company_links():
+	"""Add link fields to Company in Email Account and Communication.
+
+	These DocTypes are provided by the Frappe Framework but need to be associated
+	with a company in ERPNext to allow for multitenancy. I.e. one company should
+	not be able to access emails and communications from another company.
+	"""
+	create_custom_fields(
+		{
+			"Email Account": [
+				{
+					"label": _("Company"),
+					"fieldname": "company",
+					"fieldtype": "Link",
+					"options": "Company",
+					"insert_after": "email_id",
+				},
+			],
+			"Communication": [
+				{
+					"label": _("Company"),
+					"fieldname": "company",
+					"fieldtype": "Link",
+					"options": "Company",
+					"insert_after": "email_account",
+					"fetch_from": "email_account.company",
+					"read_only": 1,
+				},
+			],
+		},
+	)
+
+
 def add_company_to_session_defaults():
 	settings = frappe.get_single("Session Default Settings")
 	settings.append("session_defaults", {"ref_doctype": "Company"})

erpnext/support/doctype/issue/issue.json

@@ -233,6 +233,8 @@
    "options": "Project"
   },
   {
+   "fetch_from": "email_account.company",
+   "fetch_if_empty": 1,
    "fieldname": "company",
    "fieldtype": "Link",
    "label": "Company",
@@ -391,7 +393,7 @@
  "icon": "fa fa-ticket",
  "idx": 7,
  "links": [],
- "modified": "2025-02-18 21:18:52.797745",
+ "modified": "2025-09-25 11:10:53.556731",
  "modified_by": "Administrator",
  "module": "Support",
  "name": "Issue",
@@ -421,4 +423,4 @@
  "title_field": "subject",
  "track_changes": 1,
  "track_seen": 1
-}
+}