Meteor: JSON doesn't match SimpleSchema - json

Question

I got this SimpleSchema for a collection in my meteor-app
Collection.attachSchema(new SimpleSchema({
title: { type: String },
slug: { type: String, unique: true },
language: { type: String, defaultValue: "en" },
'category.element': { type: String, optional: true }
}));
And I try to insert this JSON-data, but I get insert failed: Error: Category must be an object at getErrorObject
{
"_id" : "25uAB4TfeSfwAFRgv",
"title" : "Test 123",
"slug" : "test_123",
"language" : "en",
"category" : [
{
"element" : "Anything"
}
]
}
What is wrong with my JSON-data? Or what's wrong with my SimpleSchema. I can change both of them to match the best way.

Answer 1

You need to first declare the object, like,
Collection.attachSchema(new SimpleSchema({
...,
....,
category: {type: [Object], optional: true}
}));
After that you can extend/define object field(s) like,
Collection.attachSchema(new SimpleSchema({
....,
....,
category: {type: [Object]},
'category.$.element': {type: String}
}));
use '$' if its a Array Object ([Object]), If only object then then do not use '$'.
If you do not sure about Object Structure, use another parameter blackbox:true
like,
category: {type: [Object], blackbox: true}

Answer 2

The simplest solution is to define category as an array of objects in your schema:
Collection.attachSchema(new SimpleSchema({
title: { type: String },
slug: { type: String, unique: true },
language: { type: String, defaultValue: "en" },
category: { type: [Object], optional: true }
}));
This will get you unstuck.
If you want to be more specific about the contents of category then you can define a sub-schema for category. For example:
CategorySchema = new SimpleSchema({
element: { type: String }
});
Collection.attachSchema(new SimpleSchema({
title: { type: String },
slug: { type: String, unique: true },
language: { type: String, defaultValue: "en" },
category: { type: [CategorySchema], optional: true }
}));