#guards code explainers

typescript

import { Routes } from '@angular/router';
import { inject } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { REPORT_API_URL } from './reports/report.tokens';

Route-scoped providers and lazy loading in Angular

routing dependency-injection lazy-loading

Intermediate 8 steps

typescript

import { Injectable, UnauthorizedException } from '@nestjs/common';
import { PassportStrategy } from '@nestjs/passport';
import { Strategy } from 'passport-headerapikey';
import { ConfigService } from '@nestjs/config';

Building an API-key auth strategy in NestJS

authentication passport dependency-injection

Intermediate 8 steps

typescript

import { Body, Controller, Ip, Post, UnauthorizedException } from '@nestjs/common';
import { Throttle, ThrottlerGuard } from '@nestjs/throttler';
import { UseGuards } from '@nestjs/common';
import { AuthService } from './auth.service';

Rate-limiting an auth flow in NestJS

rate-limiting authentication guards

Intermediate 8 steps

ruby

class Order < ApplicationRecord
  include AASM
 
  belongs_to :warehouse

Modeling an order lifecycle with AASM in Rails

state machine guards callbacks

Intermediate 10 steps

typescript

import {
  CanActivate,
  ExecutionContext,
  Injectable,

Role-based access with a NestJS guard

authorization guards decorators

Intermediate 6 steps

typescript

import {
  CanActivate,
  ExecutionContext,
  Injectable,

How guards chain auth in NestJS

guards authentication authorization

Intermediate 8 steps

typescript

import { CanActivate, ExecutionContext, Injectable, UnauthorizedException } from '@nestjs/common';
import { GqlExecutionContext } from '@nestjs/graphql';
import { Reflector } from '@nestjs/core';
import { JwtService } from '@nestjs/jwt';

How a GraphQL auth guard works in NestJS

authentication authorization jwt

Intermediate 7 steps

typescript

import {
  CanActivate,
  ExecutionContext,
  Injectable,

Role-based route guards in NestJS

authorization decorators metadata-reflection

Intermediate 8 steps

typescript

import {
  CanActivate,
  ExecutionContext,
  Injectable,

A rate-limiting guard in NestJS

rate-limiting guards metadata

Intermediate 7 steps