Question 115201 in Mongodb Question posted in
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Mongodb – how to mongoose delete cascade in latest version of mongoose without model.remove()?

Not able to delete cascade as Model.remove() fuction is not available in mongoose.
using findByIdAndDelete is not invoking the middleware:

BootcampSchema.pre('remove',async function(next){  //before deleting the doc
    console.log(`courses being removed from bootcamp ${this._id}`);
    await this.model('Course').deleteMany({bootcamp:this._id});
    next();
});

tried different delete methods but can’t delete cascade

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2

Answers


  1. 0

    Try using findOneAndRemove:

    BootcampSchema.findOneAndRemove({ _id: <id> });

BootcampSchema.pre('findOneAndRemove', ...);
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  2. 0

    This code is from Bootcamp model, I accidentally named it with C capital in Camp so if you named it Bootcamp just replace it in with your naming convention.

    BootCampSchema.pre('deleteOne', { document: true }, async function(next) {
  console.log(`Courses being removed from bootcamp ${this._id}`);
  await this.model('Course').deleteMany({ bootcamp: this._id });
  next();
});

    This code is from bootcamp controler

    exports.deleteBootcamp = asyncHandler(async (req, res, next) => {
  const bootcamp = await Bootcamp.findById(req.params.id);

  if (!bootcamp) {
    return next(new ErrorResponse(`Bootcamp with id of ${req.params.id} not found`, 404));
  }

  await bootcamp.deleteOne();
  await Course.deleteMany( { bootcamp: bootcamp._id });

  res.status(200).json({ 
    success: true, 
    data: {} 
  })
});

    This works perfectly for me, so I hope it’ll work for others as well.

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