codesnips

rest-api

ruby 
module Paginatable
  extend ActiveSupport::Concern

  MAX_PER_PAGE = 100
  DEFAULT_PER_PAGE = 25

API Pagination Headers (Link + Total)

rails pagination rest-api
by codesnips 3 tabs
typescript 
export interface PageInfo {
  hasNextPage: boolean;
  hasPreviousPage: boolean;
  startCursor: string | null;
  endCursor: string | null;
}

API pagination response contract (page info)

typescript pagination cursor
by codesnips 4 tabs
java 
package com.example.demo.exception;

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;

Exception handling with @ControllerAdvice

java spring-boot exception-handling
by David Kumar 3 tabs
java 
package com.shop.inventory;

import jakarta.persistence.*;

@Entity
@Table(name = "inventory_item")

Optimistic Locking on Inventory Updates with @Version and a Retrying Conflict Handler in Spring Boot

spring-boot jpa hibernate
by codesnips 3 tabs
python 
from typing import Optional
from pydantic import BaseModel, EmailStr, Field, field_validator, model_validator


class CreateUserRequest(BaseModel):
    model_config = {"extra": "forbid"}

Validating JSON Payloads with Pydantic v2 and Returning Field-Level Errors in FastAPI

fastapi pydantic validation
by codesnips 3 tabs
java 
package com.example.users.domain;

import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;

Mapping JPA Entities to DTOs with a MapStruct Mapper Injected into a Spring Service

spring-boot mapstruct dto
by codesnips 4 tabs
python 
import base64
import json
from datetime import datetime
from typing import Optional, Tuple

Opaque Cursor Pagination for FastAPI Endpoints with SQLAlchemy

fastapi sqlalchemy pagination
by codesnips 3 tabs
java 
package com.example.auth.dto;

import jakarta.validation.constraints.Email;
import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.Pattern;
import jakarta.validation.constraints.Size;

Collect Bean Validation Field Errors in a Spring Boot Signup Endpoint

spring-boot bean-validation jakarta-validation
by codesnips 3 tabs
java 
package com.example.security;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.JwtException;
import io.jsonwebtoken.io.Decoders;

Stateless JWT Authentication Filter and SecurityFilterChain in Spring Boot

java spring-boot spring-security
by codesnips 3 tabs
java 
package com.shop.orders;

import jakarta.persistence.*;
import java.math.BigDecimal;
import java.time.Instant;
import java.util.ArrayList;

Mapping a JPA Entity to a Response DTO with MapStruct in Spring Boot

spring-boot jpa mapstruct
by codesnips 4 tabs
java 
package com.example.feed;

import java.nio.charset.StandardCharsets;
import java.time.Instant;
import java.util.Base64;

Keyset (Cursor) Pagination with Spring Data JPA and Base64 Cursors

spring spring-data jpa
by codesnips 3 tabs
javascript 
const { z } = require('zod');

const signupSchema = z
  .object({
    email: z
      .string()

Reusable Zod Schema Validation Middleware for Express Signup Routes

express zod validation
by codesnips 3 tabs