PrimaryKey fetching does not work without AutoIncrement

Versions

sequelize: 5.21.3
sequelize-typescript: 1.1.0
typescript: 3.7.5

I'm submitting a ...

[x] bug report

Actual behavior: When saving a new instance with unknown primaryKey value I expect it to save the instance's id into the primaryKey, but it is actually in a prop called 'null'

Without AutoIncrement

instance.Id == null
instance.null == 3

Expected behavior: With AutoIncrement

instance.Id == 3
instance.null == undefined

Steps to reproduce:

Related code:

import {
  Sequelize,
  Model,
  Table,
  Column,
  PrimaryKey,
  // AutoIncrement,
} from 'sequelize-typescript'

@Table
class User extends Model<User> {
  @PrimaryKey
  // @AutoIncrement
  @Column
  userId!: number
}

const sequelize = new Sequelize('sqlite::memory:', {
  models: [User],
})

sequelize.sync()

setTimeout(async () => {
  await new User().save()
  await new User().save()

  const u1 = new User()
  const u2 = await u1.save()

  console.log('user#Id', u2.userId)
  console.log('user#null', (u2 as any).null)
}, 1500)

{
  "name": "tetris-server",
  "version": "1.0.0",
  "description": "",
  "main": "dist/server.js",
  "scripts": {
    "build": "tsc",
    "build:watch": "tsc --watch",
    "serve": "node dist/server",
    "serve:watch": "nodemon dist/server.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "bcrypt": "^3.0.8",
    "body-parser": "^1.19.0",
    "compression": "^1.7.4",
    "cookie-parser": "^1.4.4",
    "debug": "^4.1.1",
    "express": "^4.17.1",
    "helmet": "^3.21.2",
    "md5": "^2.2.1",
    "morgan": "^1.9.1",
    "sequelize": "^5.21.3",
    "sequelize-typescript": "^1.1.0",
    "sqlite3": "^4.1.1"
  },
  "devDependencies": {
    "@types/bcrypt": "^3.0.0",
    "@types/bluebird": "^3.5.29",
    "@types/compression": "^1.0.1",
    "@types/cookie-parser": "^1.4.2",
    "@types/debug": "^4.1.5",
    "@types/express": "^4.17.2",
    "@types/helmet": "0.0.45",
    "@types/md5": "^2.1.33",
    "@types/morgan": "^1.7.37",
    "@types/node": "^12.12.26",
    "@types/reflect-metadata": "^0.1.0",
    "@types/validator": "^12.0.1",
    "@typescript-eslint/eslint-plugin": "^2.19.0",
    "@typescript-eslint/parser": "^2.19.0",
    "eslint": "^6.8.0",
    "eslint-config-prettier": "^6.10.0",
    "eslint-config-standard": "^14.1.0",
    "eslint-plugin-import": "^2.20.1",
    "eslint-plugin-node": "^11.0.0",
    "eslint-plugin-prettier": "^3.1.2",
    "eslint-plugin-promise": "^4.2.1",
    "eslint-plugin-standard": "^4.0.1",
    "nodemon": "^2.0.2",
    "prettier": "^1.19.1",
    "typescript": "^3.7.5"
  },
  "engines": {
    "node": ">=9"
  }
}

{
  "compilerOptions": {
    /* Basic Options */
    // "incremental": true,                   /* Enable incremental compilation */
    "target": "ES2017",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    // "lib": [],                             /* Specify library files to be included in the compilation. */
    // "allowJs": true,                       /* Allow javascript files to be compiled. */
    // "checkJs": true,                       /* Report errors in .js files. */
    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
    // "outFile": "./",                       /* Concatenate and emit output to single file. */
    "outDir": "./dist",                       /* Redirect output structure to the directory. */
    // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
    // "composite": true,                     /* Enable project compilation */
    // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
    // "removeComments": true,                /* Do not emit comments to output. */
    // "noEmit": true,                        /* Do not emit outputs. */
    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */

    /* Strict Type-Checking Options */
    "strict": true,                           /* Enable all strict type-checking options. */
    "noImplicitAny": true,                    /* Raise error on expressions and declarations with an implied 'any' type. */
    "strictNullChecks": true,                 /* Enable strict null checks. */
    "strictFunctionTypes": true,              /* Enable strict checking of function types. */
    "strictBindCallApply": true,              /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
    "strictPropertyInitialization": true,     /* Enable strict checking of property initialization in classes. */
    "noImplicitThis": true,                   /* Raise error on 'this' expressions with an implied 'any' type. */
    "alwaysStrict": true,                     /* Parse in strict mode and emit "use strict" for each source file. */

    /* Additional Checks */
    "noUnusedLocals": true,                   /* Report errors on unused locals. */
    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
    "noImplicitReturns": true,                /* Report error when not all code paths in function return a value. */
    "noFallthroughCasesInSwitch": true,       /* Report errors for fallthrough cases in switch statement. */

    /* Module Resolution Options */
    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
    // "typeRoots": [],                       /* List of folders to include type definitions from. */
    // "types": [],                           /* Type declaration files to be included in compilation. */
    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
    // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */

    /* Source Map Options */
    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
    "inlineSourceMap": true,                  /* Emit a single file with source maps instead of having a separate file. */
    "inlineSources": true,                    /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */

    /* Experimental Options */
    "experimentalDecorators": true,           /* Enables experimental support for ES7 decorators. */
    "emitDecoratorMetadata": true,            /* Enables experimental support for emitting type metadata for decorators. */

    /* Advanced Options */
    "forceConsistentCasingInFileNames": true  /* Disallow inconsistently-cased references to the same file. */
  },
  "include": [
        "src/**/*"
  ],
  "exclude": [
      "node_modules/**"
  ]
}

sequelize / sequelize-typescript

PrimaryKey fetching does not work without AutoIncrement #738