Restful API之HttpPatch

更新资源很多时候会用HttpPost和HttpPut,HttpPut会进行全局更新，如果其他属性未提供会被置为null,那如果局部更新呢？HttpPost当然也可以，如果对带宽有要求而且遵循Restful风格的话只有HttpPatch了；

1、安装包：

　　映射工具：

2、添加服务依赖：

services.AddControllers().AddNewtonsoftJson(setupAction =>
            {
                setupAction.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
            }).AddXmlDataContractSerializerFormatters();
 services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());

3、实现过程（这里省略了映射过程）：

/// <summary>
        /// 更新数据
        /// </summary>
        /// <param name="jsonPatchDocument"></param>
        /// <param name="buildingId"></param>
        /// <returns></returns>
        [HttpPatch("{buildingId}")]
        public async Task<IActionResult> UpdatePropertyItem([FromBody] JsonPatchDocument<PropertyItemForUpdateDto> jsonPatchDocument,[FromRoute] string buildingId)
        {
            var fromRepo = await _propertyItemRepository.GetPropertyItemByIDAsync(buildingId);
            var patch = _mapper.Map<PropertyItemForUpdateDto>(fromRepo);
            jsonPatchDocument.ApplyTo(patch);
            _mapper.Map(patch, fromRepo);
            var res = await _propertyItemRepository.SaveRepositoryAsync();
            return Ok(res);
        }