我一直在试图弄清楚如何在本地数据库中为数据数组添加注释。我现在正在处理的想法是将注释数组添加到数据数组中，这样就可以很容易地知道哪个注释是针对哪组数据的。当我尝试使用以下代码时，它将无法正常工作：
（这是在我定义将保存数据的数组的userschema中）
test1: { type: array, required: false }
（接下来我尝试使用push添加注释数组，但它不起作用，我使用测试0作为示例通常它将取决于您要添加注释的测试.Test1包含在转向更多数组与我想要添加注释的相关数据。这就是我使用user.test1 [0]的原因
user.test1[0].push(newComment);
（当以下使用拼接时，这不起作用）
user.test1.splice(1, 0, newComment)
出于某种原因，似乎无法访问user.test1 [0]，但我不明白为什么？或者，在为测试添加注释时，我应该使用其他技术吗？
app.updateTest1 = function(newComment1, newComment2, index) {
app.errorMsg = false; // Clear any error message
app.disabled = true; // Lock form while processing
// Check if username submitted is valid
var userObject = {}; // Create the user object to pass to function
userObject._id = app.currentUser; // Pass current user _id in order to edit
userObject.test1 = [$scope.newComment1, $scope.newComment2];
User.editUser(userObject).then(function(data) {
});
};
userFactory.editUser = function(id) {
return $http.put('/api/edit', id);
};
router.put('/edit', function(req, res) {
var editUser = req.body._id; // Assign _id from user to be editted to a variable
if (req.body.name) var newName = req.body.name; // Check if a change to name was requested
if (req.body.username) var newUsername = req.body.username; // Check if a change to username was requested
if (req.body.email) var newEmail = req.body.email; // Check if a change to e-mail was requested
if (req.body.permission) var newPermission = req.body.permission; // Check if a change to permission was requested
if (req.body.test1) {
var newTest1 = req.body.test1;
}
if (req.body.test2) {
var firstTest2 = req.body.test2;
var newTest2 = firstTest2.split(" ");
}
if (req.body.test3) {
var firstTest3 = req.body.test3;
var newTest3 = firstTest3.split(" ");
}
if (req.body.test4) {
var firstTest4 = req.body.test4;
var newTest4 = firstTest4.split(" ");
}
if (req.body.test5) {
var firstTest5 = req.body.test5;
var newTest5 = firstTest5.split(" ");
}
// Look for logged in user in database to check if have appropriate access
User.findOne({ username: req.decoded.username }, function(err, mainUser) {
if (err) {
// Create an e-mail object that contains the error. Set to automatically send it to myself for troubleshooting.
var email = {
from: 'MEAN Stack Staff, cruiserweights@zoho.com',
to: 'gugui3z24@gmail.com',
subject: 'Error Logged',
text: 'The following error has been reported in the MEAN Stack Application: ' + err,
html: 'The following error has been reported in the MEAN Stack Application:<br><br>' + err
};
// Function to send e-mail to myself
client.sendMail(email, function(err, info) {
if (err) {
console.log(err); // If error with sending e-mail, log to console/terminal
} else {
console.log(info); // Log success message to console if sent
console.log(user.email); // Display e-mail that it was sent to
}
});
res.json({ success: false, message: 'Something went wrong. This error has been logged and will be addressed by our staff. We apologize for this inconvenience!' });
} else {
// Check if logged in user is found in database
if (!mainUser) {
res.json({ success: false, message: "no user found" }); // Return error
} else {
// Check if a change to name was requested
if (newName) {
// Check if person making changes has appropriate access
if (mainUser.permission === 'admin' || mainUser.permission === 'moderator') {
// Look for user in database
User.findOne({ _id: editUser }, function(err, user) {
if (err) {
// Create an e-mail object that contains the error. Set to automatically send it to myself for troubleshooting.
var email = {
from: 'MEAN Stack Staff, cruiserweights@zoho.com',
to: 'gugui3z24@gmail.com',
subject: 'Error Logged',
text: 'The following error has been reported in the MEAN Stack Application: ' + err,
html: 'The following error has been reported in the MEAN Stack Application:<br><br>' + err
};
// Function to send e-mail to myself
client.sendMail(email, function(err, info) {
if (err) {
console.log(err); // If error with sending e-mail, log to console/terminal
} else {
console.log(info); // Log success message to console if sent
console.log(user.email); // Display e-mail that it was sent to
}
});
res.json({ success: false, message: 'Something went wrong. This error has been logged and will be addressed by our staff. We apologize for this inconvenience!' });
} else {
// Check if user is in database
if (!user) {
res.json({ success: false, message: 'No user found' }); // Return error
} else {
user.name = newName; // Assign new name to user in database
// Save changes
user.save(function(err) {
if (err) {
console.log(err); // Log any errors to the console
} else {
res.json({ success: true, message: 'Name has been updated!' }); // Return success message
}
});
}
}
});
} else {
res.json({ success: false, message: 'Insufficient Permissions' }); // Return error
}
}
if (newTest1) {
// Check if person making changes has appropriate access
if (mainUser.permission === 'admin') {
// Look for user in database
User.findOne({ _id: editUser }, function(err, user) {
if (err) {
res.json({ success: false, message: 'Something went wrong. This error has been logged and will be addressed by our staff. We apologize for this inconvenience!' });
} else {
// Check if user is in database
if (!user) {
res.json({ success: false, message: 'No user found' }); // Return error
} else {
-> (this is where i think the problem is) if (Array.isArray(newTest1)) {
var index = newTest1[2];
-> this doesn't work user.test1[0].push(newTest1);
//user.test1.splice(index, 0, newTest1)
} else {
var testet1 = newTest1.split(" ");
user.test1.push(testet1); // Assign new name to user in database
}
// Save changes
user.save(function(err) {
if (err) {
console.log(err); // Log any errors to the console
} else {
res.json({ success: true, message: 'Name has been updated!' }); // Return success message
}
});
}
}
});
} else {
res.json({ success: false, message: 'Insufficient Permissions' }); // Return error
}
}
答案 0 :(得分：0)
在操作之前，您需要确保user.test1[0]值存在。所以，如果你的user.test1
var user = {};
user.test = [];
var arrayToPush = [1,2,3];
try {
user.test[0].push(arrayToPush)
} catch (err) {
document.getElementById('out').innerHTML += err
}
var user2 ={}
user2.test=[];
try {
user2.test.push(arrayToPush)
user2.test.push(arrayToPush)
} catch (err) {
document.getElementById('out2').innerHTML += err
}
document.getElementById('out2').innerHTML += user2.test[0]<div id="out"></div>
<br>
<div id="out2"></div>
数组没有任何值，你可以推动任何事情。