errors.txt

# Within models.ts

# With `Foo`
Cannot find name 'Foo'

# With `Foo.Foo`
Cannot find namespace 'Foo'

models.d.ts

/// <reference path='./../../typings/mongoose/mongoose.d.ts' />
// From: https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/mongoose/mongoose.d.ts

import * as mongoose from 'mongoose';

// Tried `V0`, `V1`, `V2`, `V3` independently. None worked.

/* V0 */
export interface Foo extends mongoose.Document {
    name: string;
}

/* V1 */
declare module Foo {
    export interface ServiceInstance extends mongoose.Document {
        name: string;
    }
}

/* V2 */
declare var Foo: Foo.Foo;

declare module Foo {
    export interface Foo extends mongoose.Document {
        name: string;
    }
}

/* V3 */
declare var Foo: Foo.Foo;

declare module Foo {
    export interface Foo extends mongoose.Document {
        name: string;
    }
}

declare module "models" {
    export = Foo
}
}

models.ts

/// <reference path='./models.d.ts' />

import * as mongoose from 'mongoose';

export function Foo(model): Foo.Foo /* also tried `Foo` */ {
return mongoose.model('Foo', new mongoose.Schema({
        name: String
    }));
}

tsconfig.json

{
    "compilerOptions": {
        "target": "es5",
        "module": "commonjs",
        "moduleResolution": "node",
        "isolatedModules": false,
        "jsx": "react",
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "declaration": false,
        "noImplicitAny": false,
        "removeComments": true,
        "noLib": false,
        "preserveConstEnums": true,
        "suppressImplicitAnyIndexErrors": true
    },
    "filesGlob": [
        "**/*.ts",
        "**/*.tsx",
        "!node_modules/**"
    ],
    "compileOnSave": true,
    "buildOnSave": false,
    "files": [
        "foo/bar/models.d.ts",
        "foo/bar/models.ts",
        "typings/mongoose/mongoose.d.ts",
        "typings/node/node.d.ts"
    ],
    "atom": {
        "rewriteTsconfig": true
    }
}