Added check if the ID is empty when deleting

models/authors_delete.go

@@ -1,7 +1,14 @@
 package models
 
+import "fmt"
+
 // DeleteAuthorByID deletes an author by its ID
 func DeleteAuthorByID(id int64) error {
+	// Check if the id is 0
+	if id == 0 {
+		return fmt.Errorf("ID cannot be 0")
+	}
+
 	// Delete the author
 	_, err := x.Id(id).Delete(&Author{})
 

models/books_delete.go

@@ -1,7 +1,14 @@
 package models
 
+import "fmt"
+
 // DeleteBookByID deletes a book by its ID
 func DeleteBookByID(id int64) error {
+	// Check if the id is 0
+	if id == 0 {
+		return fmt.Errorf("ID cannot be 0")
+	}
+
 	// Delete the book
 	_, err := x.Id(id).Delete(&Book{})
 

models/publishers_delete.go

@@ -1,7 +1,14 @@
 package models
 
+import "fmt"
+
 // DeletePublisherByID deletes a publisher by its ID
 func DeletePublisherByID(id int64) error {
+	// Check if the id is 0
+	if id == 0 {
+		return fmt.Errorf("ID cannot be 0")
+	}
+
 	// Delete the publisher
 	_, err := x.Id(id).Delete(&Publisher{})