{ [CastError: Cast to ObjectId failed for value “” at path “_id”] message: ‘Cast to ObjectId failed for value “” at path “_id”’, name: ‘CastError’, kind: ‘ObjectId’, value: ‘’, path: ‘_id’, reason: undefined } { [ValidationError: Movie validation failed] message: ‘Movie validation failed’, name: ‘ValidationError’, errors: { _id: { [CastError: Cast to ObjectID failed for value “” at path “_id”] message: ‘Cast to ObjectID failed for value “” at path “_id”’, name: ‘CastError’, kind: ‘ObjectID’, value: ‘’, path: ‘_id’, reason: [Object] } } } d:\NodeWork\Study1\routes\index.js:105 res.redirect(’/movie/’ + movie._id) ^

TypeError: Cannot read property ‘_id’ of undefined at d:\NodeWork\Study1\routes\index.js:105:47 at d:\NodeWork\Study1\node_modules\mongoose\lib\document.js:1908:19 at handleError (d:\NodeWork\Study1\node_modules\mongoose\node_modules\hooks-fixed\hooks.js:40:22) at _next (d:\NodeWork\Study1\node_modules\mongoose\node_modules\hooks-fixed\hooks.js:46:22) at fnWrapper (d:\NodeWork\Study1\node_modules\mongoose\node_modules\hooks-fixed\hooks.js:186:18) at d:\NodeWork\Study1\node_modules\mongoose\lib\schema.js:200:17 at d:\NodeWork\Study1\node_modules\mongoose\node_modules\kareem\index.js:127:16 at nextTickCallbackWith0Args (node.js:420:9) at process._tickCallback (node.js:349:13)

Process finished with exit code 1

-----------------------这是源码

app.post(’/admin/movie/new’, function (req, res) { var id = req.body.movie._id; var movieObj = req.body.movie; var _movie;

if (id !== undefined) {
    Movie.findById(id, function (err, movie) {
        if (err) {
            console.log(err)
        }

        if (movie == undefined) {
            movie = new Movie({
                doctor: movieObj.doctor,
                title: movieObj.title,
                country: movieObj.country,
                language: movieObj.language,
                year: movieObj.year,
                poster: movieObj.poster,
                summary: movieObj.summary,
                flash: movieObj.flash
            })
        }

        _movie = _.extend(movie, movieObj);
        _movie.save(function (err, movie) {
            if (err) {
                console.log(err)
            }
            res.redirect('/movie/' + movie._id)
        })
    })
}
else {
    _movie = new Movie({
        doctor: movieObj.doctor,
        title: movieObj.title,
        country: movieObj.country,
        language: movieObj.language,
        year: movieObj.year,
        poster: movieObj.poster,
        summary: movieObj.summary,
        flash: movieObj.flash
    });

    _movie.save(function (err, movie) {
        if (err) {
            console.log(err)
        }
        res.redirect('/movie/' + movie._id)
    })
}

});