34 lines
944 B
C#
34 lines
944 B
C#
using System;
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using System.Linq;
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using System.Linq.Expressions;
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using ServiceStack.OrmLite;
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using Finch.Extensions;
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namespace Finch.Sqlite;
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public static class SqlExpressionExtensions
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{
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public static SqlExpression<T> Paging<T>(this SqlExpression<T> source, int pageNumber, int pageSize)
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{
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pageNumber = pageNumber.Limit(1, 10_000_000);
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pageSize = pageSize.Limit(1, 1_000);
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if (pageNumber <= 0 || pageSize <= 0)
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{
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throw new NotSupportedException("Both pageNumber and pageSize must be greater than z_ero");
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}
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return source.Skip((pageNumber - 1) * pageSize).Take(pageSize);
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}
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public static SqlExpression<T> WhereIf<T>(this SqlExpression<T> source, Expression<Func<T, bool>> predicate, bool condition, Expression<Func<T, bool>> elsePredicate = null)
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{
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if (condition)
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{
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return source.Where(predicate);
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}
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return elsePredicate != null ? source.Where(elsePredicate) : source;
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}
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}
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