update book to DB is done

Author: anijitsao

src/dbRelated/booksDbOps.js

@@ -58,4 +58,25 @@ const deleteBookFromDB = async (bookToDelete) => {
   }
 };
 
-export { findBooksFromDB, addBookToDB, deleteBookFromDB };
+const updateBookToDB = async (bookToUpdate) => {
+  console.log("Book to update", bookToUpdate);
+  // create the connection
+  const client = createConnectionToDB();
+  try {
+    // select the DB and collection
+    const db = selectDB(client, DB_NAME);
+    const bookDeleted = await db
+      .collection(COLLECTION_BOOKS)
+      .updateOne(
+        { _id: convertToObjectId(bookToUpdate._id) },
+        { $set: { ...bookToUpdate.updateBookData } }
+      );
+    return bookDeleted.modifiedCount;
+  } catch (error) {
+    return error.toString();
+  } finally {
+    await closeConnectionToDB(client);
+  }
+};
+
+export { findBooksFromDB, addBookToDB, deleteBookFromDB, updateBookToDB };

src/resolvers/bookResolver.js

@@ -3,6 +3,7 @@ import {
   findBooksFromDB,
   addBookToDB,
   deleteBookFromDB,
+  updateBookToDB,
 } from "../dbRelated/booksDbOps.js";
 
 const resolvers = {
@@ -19,6 +20,9 @@ const resolvers = {
     deleteBook: (_, args) => {
       return deleteBookFromDB(args);
     },
+    updateBook: (_, args) => {
+      return updateBookToDB(args);
+    },
   },
 };
 export { resolvers };

src/typedefs/bookTypedef.js

@@ -12,10 +12,16 @@ const booksTypeDefs = gql`
     findBooks: [Book]
   }
 
+  input UpdataBookParams {
+    name: String!
+    published: Int
+  }
+
   # All the Mutations on Book listed here
   type Mutation {
     addBook(name: String!): Book!
     deleteBook(_id: ID!): Int!
+    updateBook(_id: ID!, updateBookData: UpdataBookParams!): Int!
   }
 `;