MongoDB using NodeJS api return Null why? - node.js

Question

I know there is a lot of post about that but none have my problem, my tables exist, the path work to some extent but two of the request just return null and I have no idea why.
Here the request that dont work :
// *Get Chat Message*
router.get("/message/:MessageId",async(req, res)=>{
try{
const message = await Message.findById(req.params.MessageId);
res.status(200).json(message)
} catch (err){
res.status(500).json(err)
}
})
// *Get All Chat Message*
router.get("/message/findAll",async(req, res)=>{
try {
const messages = await Message.find();
res.status(200).json(messages)
} catch (err) {
res.status(500).json(err);
}
})
If need here is the rest of the file where ALL the requests work PERFECTLY so I don't know why only those two don't work.
const router = require("express").Router();
const Post = require("../models/Post");
const User = require("../models/User");
const Chat = require("../models/Chat");
const Message = require("../models/ChatMessage");
// * Get a Chat *
router.get("/:firstUserId/:secondUserId", async(req, res) => {
const chat = await Chat.findOne({ users: { $all: [req.params.firstUserId, req.params.secondUserId] } });
res.status(200).json(chat);
})
// * Get every Chat of one user *
router.get("/:userId", async(req, res) => {
try{
const chats = await Chat.find({ users: { $all: [req.params.userId]} });
res.status(200).json(chats);
}catch(err){
res.status(500).json(err);
}
})
// *Create Chat*
router.post("/",async(req, res)=>{
const chat = new Chat(req.body)
try {
const savedChat = await chat.save();
res.status(200).json(savedChat);
}catch(err){
res.status(500).json(err)
}
})
// *Delete Chat*
router.delete("/:firstUserId/:secondUserId",async(req, res)=>{
const chat = await Chat.findOne({ users: { $all: [req.params.firstUserId, req.params.secondUserId] } });
try{
chat.deleteOne();
res.status(200).json("The chat has been delete successfully.")
} catch (err){
res.status(500).json(err)
}
})
// *Put Chat Message*
router.put("/message",async(req, res)=>{
const newMessage = new Message(req.body)
try {
const savedMessage = await newMessage.save();
res.status(200).json(savedMessage)
} catch (err) {
res.status(500).json(err)
}
})
The schema name and parameter of the database are the same so I don't know why it doesn't work. It still returns null even if I erase the two that don't work, it only returns an error if I delete the whole file.
Here is my schema:
const mongoose = require("mongoose");
const ChatMessageSchema = new mongoose.Schema({
conversationId: {
type: String,
required: true
},
userId: {
type: String,
required: true
},
content: {
type: String,
required: true,
max: 5000
},
state: {
type: Number,
default: 0
}
},
{ timestamps: true }
);
module.exports = mongoose.model("chat_message", ChatMessageSchema,"chat_messages");
The table
Request done in Postman

Answer 1

to get all document use
Model.find({});
and for single try the following
Model.findOne({_id: <id>})

Answer 2

Finaly found the error.
The problem is that for express /message and /message/:MessageId were on the same path.
/findAll still does not work but I don't need it.