Schema error when reusing same field - meteor

Question

I have two separate schemas that use the same field. I've tried to create schemaComponents so that I can update both schemas in one location however I get an error Error: Invalid definition for school.$ field. when I use it. I'm not sure what I'm doing wrong here, I was under the impression this was allowed.
Path: SchemaComponents.js
SchemaComponents = {
schools: {
type: [String],
optional: true,
autoform: {
options: [
{label: "School One", value: 'SchoolOne'},
{label: "School Two", value: 'SchoolTwo'},
{label: "School Three", value: 'SchoolThree'},
]
}
}
};
Path: StudentSchema.js
import from '../components/SchemaComponents.js';
StudentSchema = new Mongo.Collection("studentSchema");
var Schemas = {};
Schemas.StudentSchema = new SimpleSchema({
school: SchemaComponents.schools,
});
StudentSchema.attachSchema(Schemas.StudentSchema);
Path: TeacherSchema.js
import from '../components/SchemaComponents.js';
TeacherSchema = new Mongo.Collection("teacherSchema");
var Schemas = {};
Schemas.TeacherSchema = new SimpleSchema({
school: SchemaComponents.schools,
});
TeacherSchema.attachSchema(Schemas.TeacherSchema);

Answer 1

You defined SchemaComponent as a simple object and not as a SimpleSchema object. To reuse your schools definition do:
let schoolsSchema = new SimpleSchema({
schools: {
type: [String],
optional: true,
autoform: {
options: [
{label: "School One", value: 'SchoolOne'},
{label: "School Two", value: 'SchoolTwo'},
{label: "School Three", value: 'SchoolThree'},
]
}
}
});
Then you can do:
Schemas.TeacherSchema = new SimpleSchema({
school: {
type: schoolsSchema
}
});