35 lines
1005 B
C#
35 lines
1005 B
C#
using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using Microsoft.EntityFrameworkCore;
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using System.Linq.Dynamic.Core;
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namespace IRaCIS.Core.Infrastructure.Extention
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{
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public static class IQueryableExtensions
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{
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/// <summary>
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/// 获取第一条 null提示
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/// </summary>
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/// <typeparam name="TSource"></typeparam>
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/// <param name="source"></param>
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/// <returns></returns>
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/// <exception cref="QueryBusinessObjectNotExistException"></exception>
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public static async Task<TSource> FirstNotNullAsync<TSource>(this IQueryable<TSource> source)
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{
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var result =await source.FirstOrDefaultAsync();
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if (result == null)
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{
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throw new QueryBusinessObjectNotExistException($"The query object does not exist in database, Please check the query parameters");
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}
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else
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{
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return result;
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}
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}
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}
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}
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