fix: Content fetching for articles and videos

erpnext/public/js/education/lms/components/Article.vue

@@ -31,7 +31,10 @@ export default {
     },
     methods: {
         getContent() {
-            return frappe.db.get_doc(this.type, this.content)
+            return lms.call('get_content', {
+                type: this.type,
+                content: this.content
+            })
         }
     },
     components: {

erpnext/public/js/education/lms/components/Video.vue

@@ -50,7 +50,10 @@ export default {
     },
     methods: {
         getContent() {
-            return frappe.db.get_doc(this.type, this.content)
+            return lms.call('get_content', {
+                type: this.type,
+                content: this.content
+            })
         }
     }
 };

erpnext/www/lms.py

@@ -281,3 +281,10 @@ def get_topics(course_name):
 	course = frappe.get_doc('Course', course_name)
 	topics = course.get_topics()
 	return topics
+
+@frappe.whitelist()
+def get_content(type, content):
+	try:
+		return frappe.get_doc(type, content)
+	except:
+		return None