From 8d7c68ea00fbe5d69417f5644aa19b6ec707b9e1 Mon Sep 17 00:00:00 2001
From: GF <gunhoflash@gmail.com>
Date: Wed, 30 Sep 2020 18:10:43 +0900
Subject: [PATCH 1/2] Wait DB connection

---
 server/server.ts | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/server/server.ts b/server/server.ts
index 1201b99..4a44717 100644
--- a/server/server.ts
+++ b/server/server.ts
@@ -4,6 +4,11 @@ const { db } = require('./server/db');
 
 const port = process.env.PORT || 3000;
 
-db();
-app.listen(port);
-console.info(`Listening to http://0.0.0.0:${port}`);
+async function start_server() {
+  await db();
+  app.listen(port, () => {
+    console.info(`Listening to http://0.0.0.0:${port}`);
+  });
+}
+
+start_server();

From 07cb9771d9f88de449300832c1023f5aea5d21ec Mon Sep 17 00:00:00 2001
From: GF <gunhoflash@gmail.com>
Date: Wed, 30 Sep 2020 18:14:25 +0900
Subject: [PATCH 2/2] Wait DB connection

---
 server/server/db.ts | 59 ++++++++++++++++++++++-----------------------
 1 file changed, 29 insertions(+), 30 deletions(-)

diff --git a/server/server/db.ts b/server/server/db.ts
index 1b9c305..4022fe8 100644
--- a/server/server/db.ts
+++ b/server/server/db.ts
@@ -6,36 +6,35 @@ const { collectionInfo } = require('./type');
 
 async function mongoConnect() { // mongoDB 연결 함수
   const secret = await config;
-  mongoose.connect(secret.mongoURI,
-    {
-      useNewUrlParser: true,
-      useUnifiedTopology: true,
-      useFindAndModify: false,
-      useCreateIndex: true,
-    })
-    .then(async () => {
-      const collections = await mongoose.connection.db.listCollections().toArray();
-      let check = collections.findIndex((coll: typeof collectionInfo) => coll.name === 'answerpapers');
-      if (check === -1) {
-        await mongoose.connection.db.createCollection('answerpapers');
-      }
-      check = collections.findIndex((coll: typeof collectionInfo) => coll.name === 'groups');
-      if (check === -1) {
-        await mongoose.connection.db.createCollection('groups');
-      }
-      check = collections.findIndex((coll: typeof collectionInfo) => coll.name === 'assignments');
-      if (check === -1) {
-        await mongoose.connection.db.createCollection('assignments');
-      }
-      check = collections.findIndex((coll: typeof collectionInfo) => coll.name === 'counters');
-      if (check === -1) {
-        await mongoose.connection.db.createCollection('counters');
-      }
-      console.log('DB와 연결되었습니다.');
-    })
-    .catch((e: Error) => {
-      throw (e);
-    });
+  await mongoose.connect(secret.mongoURI, {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+    useFindAndModify: false,
+    useCreateIndex: true,
+  })
+  .then(async () => {
+    const collections = await mongoose.connection.db.listCollections().toArray();
+    let check = collections.findIndex((coll: typeof collectionInfo) => coll.name === 'answerpapers');
+    if (check === -1) {
+      await mongoose.connection.db.createCollection('answerpapers');
+    }
+    check = collections.findIndex((coll: typeof collectionInfo) => coll.name === 'groups');
+    if (check === -1) {
+      await mongoose.connection.db.createCollection('groups');
+    }
+    check = collections.findIndex((coll: typeof collectionInfo) => coll.name === 'assignments');
+    if (check === -1) {
+      await mongoose.connection.db.createCollection('assignments');
+    }
+    check = collections.findIndex((coll: typeof collectionInfo) => coll.name === 'counters');
+    if (check === -1) {
+      await mongoose.connection.db.createCollection('counters');
+    }
+    console.log('DB와 연결되었습니다.');
+  })
+  .catch((e: Error) => {
+    throw (e);
+  });
 }
 
 exports.db = async () => {