How do you turn a Mongoose document into a plain object

Question

I have a document from a mongoose find that I want to extend before JSON encoding and sending out as a response  If I try adding properties to the doc it is ignored  The properties don t appear in Object getOwnPropertyNames doc  making a normal extend not possible  The strange thing is that JSON parse JSON encode doc   works and returns an object with all of the correct properties  Is there a better way to do this

User · Accepted Answer

Mongoose Models inherit from Documents  which have a toObject   method   I believe what you re looking for should be the result of doc toObject     http   mongoosejs com docs api html document Document-toObject

User · Answer

In some cases as  JohnnyHK suggested  you would want to get the Object as a Plain Javascript  as described in this Mongoose Documentation there is another alternative to query the data directly as object  const docs   await Model find   lean     In addition if someone might want to conditionally turn to an object it is also possible as an option argument  see find   docs at the third parameter  const toObject   true  const docs   await Model find    null  lean toObject     its available on the fonctions  find    findOne    findById    findOneAndUpdate    and findByIdAndUpdate

User · Answer

the fast way if the property is not in the model    document set  key value    strict  false

User · Answer

The lean option tells Mongoose to skip hydrating the result documents  This makes queries faster and less memory intensive  but the result documents are plain old JavaScript objects  POJOs   not Mongoose documents  const leanDoc   await MyModel findOne   lean     not necessary to use JSON parse   method

User · Answer

A better way of tackling an issue like this is using doc toObject   like this  doc toObject   getters  true      other options include    getters  apply all getters  path and virtual getters  virtuals  apply virtual getters  can override getters option  minimize  remove empty objects  defaults to true  transform  a transform function to apply to the resulting document before returning depopulate  depopulate any populated paths  replacing them with their original refs  defaults to false  versionKey  whether to include the version key  defaults to true    so for example you can say   Model findOne   exec  err  doc    gt       if   err          doc toObject   getters  true          console log  doc  id    doc  id            and now it will work   For reference  see  http   mongoosejs com docs api html document Document-toObject

User · Answer

You can also stringify the object and then again parse to make the normal object  For example like -   const obj   JSON parse JSON stringify mongoObj

User · Answer

To get plain object from Mongoose document  I used  doc property as follows  mongooseDoc  doc    returns plain json object   I tried with toObject but it gave me functions arguments and all other things which i don t need

User · Answer

Another way to do this is to tell Mongoose that all you need is a plain JavaScript version of the returned doc by using lean   in the query chain   That way Mongoose skips the step of creating the full model instance and you directly get a doc you can modify   MyModel findOne   lean   exec function err  doc        doc addedProperty    foobar       res json doc

[node.js] How do you turn a Mongoose document into a plain object?

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