Allow `schema` as a schema path name

[songguangyu]

Do you want to request a feature or report a bug?
Bug

What is the current behavior?
When i set schema name schema,

mongoose throw err

mongoose/lib/schema.js line 528

If the current behavior is a bug, please provide the steps to reproduce.

const schema = new Schema({ 'schema': { type: String, default: '{}'}, });
What is the expected behavior?
I can set name schema in Schema
What are the versions of Node.js, Mongoose and MongoDB you are using? Note that "latest" is not a version.
Mongoose version 5.4.7
5.9.9 alse have this problem
https://github.com/Automattic/mongoose/blob/master/lib/schema.js#L645
Nodejs version 12

[AbdelrahmanHafez]

https://mongoosejs.com/docs/api.html#schema_Schema.reserved

[songguangyu]

@AbdelrahmanHafez Thanks for you answer, I am working on service migration. If the schema field already exists in the original database, how should I deal with this situation?

[AbdelrahmanHafez]

In that case I would rename the schema field into a different field name.
I've always found thesaurus quite helpful in finding synonyms.

[songguangyu]

@AbdelrahmanHafez Maybe another mongo client is a better solution.

[AbdelrahmanHafez]

I can't make that choice for you, depending on the effort of renaming the field, and the features mongoose provides. See what outweighs what, and make your decision.

Perhaps @vkarpov15 has a better idea.

[songguangyu]

@AbdelrahmanHafez thanks!

[vkarpov15]

Some path names unfortunately do conflict with existing methods and properties. However, there are ways for us to work around this. I'll keep this open for a future release.