// Admin.NET 项目的版权、商标、专利和其他相关权利均受相应法律法规的保护。使用本项目应遵守相关法律法规和许可证的要求。
|
//
|
// 本项目主要遵循 MIT 许可证和 Apache 许可证(版本 2.0)进行分发和使用。许可证位于源代码树根目录中的 LICENSE-MIT 和 LICENSE-APACHE 文件。
|
//
|
// 不得利用本项目从事危害国家安全、扰乱社会秩序、侵犯他人合法权益等法律法规禁止的活动!任何基于本项目二次开发而产生的一切法律纠纷和责任,我们不承担任何责任!
|
|
using System.Text.Json;
|
|
namespace Admin.NET.Core;
|
|
/// <summary>
|
/// Sqlsugar 动态查询扩展方法
|
/// </summary>
|
public static class SqlSugarExtension
|
{
|
public static ISugarQueryable<T> SearchBy<T>(this ISugarQueryable<T> queryable, BaseFilter filter)
|
{
|
return queryable.SearchByKeyword(filter.Keyword)
|
.AdvancedSearch(filter.Search)
|
.AdvancedFilter(filter.Filter);
|
}
|
|
public static ISugarQueryable<T> SearchByKeyword<T>(this ISugarQueryable<T> queryable, string keyword)
|
{
|
return queryable.AdvancedSearch(new Search { Keyword = keyword });
|
}
|
|
public static ISugarQueryable<T> AdvancedSearch<T>(this ISugarQueryable<T> queryable, Search search)
|
{
|
if (!string.IsNullOrWhiteSpace(search?.Keyword))
|
{
|
var paramExpr = Expression.Parameter(typeof(T));
|
|
Expression right = Expression.Constant(false);
|
|
if (search.Fields?.Any() is true)
|
{
|
foreach (string field in search.Fields)
|
{
|
MemberExpression propertyExpr = GetPropertyExpression(field, paramExpr);
|
|
var left = AddSearchPropertyByKeyword<T>(propertyExpr, search.Keyword);
|
|
right = Expression.Or(left, right);
|
}
|
}
|
else
|
{
|
var properties = typeof(T).GetProperties()
|
.Where(prop => Nullable.GetUnderlyingType(prop.PropertyType) == null
|
&& !prop.PropertyType.IsEnum
|
&& Type.GetTypeCode(prop.PropertyType) != TypeCode.Object);
|
|
foreach (var property in properties)
|
{
|
var propertyExpr = Expression.Property(paramExpr, property);
|
|
var left = AddSearchPropertyByKeyword<T>(propertyExpr, search.Keyword);
|
|
right = Expression.Or(left, right);
|
}
|
}
|
|
var lambda = Expression.Lambda<Func<T, bool>>(right, paramExpr);
|
|
return queryable.Where(lambda);
|
}
|
|
return queryable;
|
}
|
|
public static ISugarQueryable<T> AdvancedFilter<T>(this ISugarQueryable<T> queryable, Filter filter)
|
{
|
if (filter is not null)
|
{
|
var parameter = Expression.Parameter(typeof(T));
|
|
Expression binaryExpresioFilter;
|
|
if (filter.Logic.HasValue)
|
{
|
if (filter.Filters is null) throw new ArgumentException("The Filters attribute is required when declaring a logic");
|
binaryExpresioFilter = CreateFilterExpression(filter.Logic.Value, filter.Filters, parameter);
|
}
|
else
|
{
|
var filterValid = GetValidFilter(filter);
|
binaryExpresioFilter = CreateFilterExpression(filterValid.Field!, filterValid.Operator.Value, filterValid.Value, parameter);
|
}
|
|
var lambda = Expression.Lambda<Func<T, bool>>(binaryExpresioFilter, parameter);
|
|
return queryable.Where(lambda);
|
}
|
return queryable;
|
}
|
|
private static Expression CombineFilter(
|
FilterLogicEnum filterLogic,
|
Expression bExpresionBase,
|
Expression bExpresion)
|
{
|
return filterLogic switch
|
{
|
FilterLogicEnum.And => Expression.And(bExpresionBase, bExpresion),
|
FilterLogicEnum.Or => Expression.Or(bExpresionBase, bExpresion),
|
FilterLogicEnum.Xor => Expression.ExclusiveOr(bExpresionBase, bExpresion),
|
_ => throw new ArgumentException("FilterLogic is not valid.", nameof(filterLogic)),
|
};
|
}
|
|
private static Filter GetValidFilter(Filter filter)
|
{
|
if (string.IsNullOrEmpty(filter.Field)) throw new ArgumentException("The field attribute is required when declaring a filter");
|
if (filter.Operator.IsNullOrEmpty()) throw new ArgumentException("The Operator attribute is required when declaring a filter");
|
return filter;
|
}
|
|
private static Expression CreateFilterExpression(
|
FilterLogicEnum filterLogic,
|
IEnumerable<Filter> filters,
|
ParameterExpression parameter)
|
{
|
Expression filterExpression = default!;
|
|
foreach (var filter in filters)
|
{
|
Expression bExpresionFilter;
|
|
if (filter.Logic.HasValue)
|
{
|
if (filter.Filters is null) throw new ArgumentException("The Filters attribute is required when declaring a logic");
|
bExpresionFilter = CreateFilterExpression(filter.Logic.Value, filter.Filters, parameter);
|
}
|
else
|
{
|
var filterValid = GetValidFilter(filter);
|
bExpresionFilter = CreateFilterExpression(filterValid.Field!, filterValid.Operator.Value, filterValid.Value, parameter);
|
}
|
|
filterExpression = filterExpression is null ? bExpresionFilter : CombineFilter(filterLogic, filterExpression, bExpresionFilter);
|
}
|
|
return filterExpression;
|
}
|
|
private static Expression CreateFilterExpression(
|
string field,
|
FilterOperatorEnum filterOperator,
|
object? value,
|
ParameterExpression parameter)
|
{
|
var propertyExpresion = GetPropertyExpression(field, parameter);
|
var valueExpresion = GeValuetExpression(field, value, propertyExpresion.Type);
|
return CreateFilterExpression(propertyExpresion, valueExpresion, filterOperator);
|
}
|
|
private static Expression CreateFilterExpression(
|
MemberExpression memberExpression,
|
ConstantExpression constantExpression,
|
FilterOperatorEnum filterOperator)
|
{
|
return filterOperator switch
|
{
|
FilterOperatorEnum.EQ => Expression.Equal(memberExpression, constantExpression),
|
FilterOperatorEnum.NEQ => Expression.NotEqual(memberExpression, constantExpression),
|
FilterOperatorEnum.LT => Expression.LessThan(memberExpression, constantExpression),
|
FilterOperatorEnum.LTE => Expression.LessThanOrEqual(memberExpression, constantExpression),
|
FilterOperatorEnum.GT => Expression.GreaterThan(memberExpression, constantExpression),
|
FilterOperatorEnum.GTE => Expression.GreaterThanOrEqual(memberExpression, constantExpression),
|
FilterOperatorEnum.Contains => Expression.Call(memberExpression, nameof(FilterOperatorEnum.Contains), null, constantExpression),
|
FilterOperatorEnum.StartsWith => Expression.Call(memberExpression, nameof(FilterOperatorEnum.StartsWith), null, constantExpression),
|
FilterOperatorEnum.EndsWith => Expression.Call(memberExpression, nameof(FilterOperatorEnum.EndsWith), null, constantExpression),
|
_ => throw new ArgumentException("Filter Operator is not valid."),
|
};
|
}
|
|
private static string GetStringFromJsonElement(object value)
|
{
|
if (value is JsonElement) return ((JsonElement)value).GetString()!;
|
if (value is string) return (string)value;
|
return value?.ToString();
|
}
|
|
private static ConstantExpression GeValuetExpression(
|
string field,
|
object? value,
|
Type propertyType)
|
{
|
if (value == null) return Expression.Constant(null, propertyType);
|
|
if (propertyType.IsEnum)
|
{
|
string? stringEnum = GetStringFromJsonElement(value);
|
|
if (!Enum.TryParse(propertyType, stringEnum, true, out object? valueparsed)) throw new ArgumentException(string.Format("Value {0} is not valid for {1}", value, field));
|
|
return Expression.Constant(valueparsed, propertyType);
|
}
|
if (propertyType == typeof(long) || propertyType == typeof(long?))
|
{
|
string? stringLong = GetStringFromJsonElement(value);
|
|
if (!long.TryParse(stringLong, out long valueparsed)) throw new ArgumentException(string.Format("Value {0} is not valid for {1}", value, field));
|
|
return Expression.Constant(valueparsed, propertyType);
|
}
|
|
if (propertyType == typeof(Guid))
|
{
|
string? stringGuid = GetStringFromJsonElement(value);
|
|
if (!Guid.TryParse(stringGuid, out Guid valueparsed)) throw new ArgumentException(string.Format("Value {0} is not valid for {1}", value, field));
|
|
return Expression.Constant(valueparsed, propertyType);
|
}
|
|
if (propertyType == typeof(string))
|
{
|
string? text = GetStringFromJsonElement(value);
|
|
return Expression.Constant(text, propertyType);
|
}
|
|
if (propertyType == typeof(DateTime) || propertyType == typeof(DateTime?))
|
{
|
string? text = GetStringFromJsonElement(value);
|
return Expression.Constant(ChangeType(text, propertyType), propertyType);
|
}
|
|
return Expression.Constant(ChangeType(((JsonElement)value).GetRawText(), propertyType), propertyType);
|
}
|
|
private static dynamic? ChangeType(object value, Type conversion)
|
{
|
var t = conversion;
|
|
if (t.IsGenericType && t.GetGenericTypeDefinition().Equals(typeof(Nullable<>)))
|
{
|
if (value == null)
|
{
|
return null;
|
}
|
|
t = Nullable.GetUnderlyingType(t);
|
}
|
|
return Convert.ChangeType(value, t!);
|
}
|
|
private static MemberExpression GetPropertyExpression(
|
string propertyName,
|
ParameterExpression parameter)
|
{
|
Expression propertyExpression = parameter;
|
foreach (string member in propertyName.Split('.'))
|
{
|
propertyExpression = Expression.PropertyOrField(propertyExpression, member);
|
}
|
|
return (MemberExpression)propertyExpression;
|
}
|
|
private static Expression AddSearchPropertyByKeyword<T>(
|
Expression propertyExpr,
|
string keyword,
|
FilterOperatorEnum operatorSearch = FilterOperatorEnum.Contains)
|
{
|
if (propertyExpr is not MemberExpression memberExpr || memberExpr.Member is not PropertyInfo property)
|
{
|
throw new ArgumentException("propertyExpr must be a property expression.", nameof(propertyExpr));
|
}
|
|
ConstantExpression constant = Expression.Constant(keyword);
|
|
MethodInfo method = operatorSearch switch
|
{
|
FilterOperatorEnum.Contains => typeof(string).GetMethod(nameof(FilterOperatorEnum.Contains), new Type[] { typeof(string) }),
|
FilterOperatorEnum.StartsWith => typeof(string).GetMethod(nameof(FilterOperatorEnum.StartsWith), new Type[] { typeof(string) }),
|
FilterOperatorEnum.EndsWith => typeof(string).GetMethod(nameof(FilterOperatorEnum.EndsWith), new Type[] { typeof(string) }),
|
_ => throw new ArgumentException("Filter Operator is not valid."),
|
};
|
|
Expression selectorExpr =
|
property.PropertyType == typeof(string)
|
? propertyExpr
|
: Expression.Condition(
|
Expression.Equal(Expression.Convert(propertyExpr, typeof(object)), Expression.Constant(null, typeof(object))),
|
Expression.Constant(null, typeof(string)),
|
Expression.Call(propertyExpr, "ToString", null, null));
|
|
return Expression.Call(selectorExpr, method, constant);
|
}
|
|
#region 视图操作
|
|
/// <summary>
|
/// 获取映射SQL语句, 用于创建视图
|
/// </summary>
|
/// <param name="queryable"></param>
|
/// <typeparam name="T"></typeparam>
|
/// <returns></returns>
|
public static string ToMappedSqlString<T>(this ISugarQueryable<T> queryable) where T : class
|
{
|
ArgumentNullException.ThrowIfNull(queryable);
|
|
// 获取实体映射信息
|
var entityInfo = queryable.Context.EntityMaintenance.GetEntityInfo(typeof(T));
|
if (entityInfo?.Columns == null || entityInfo.Columns.Count == 0) return queryable.ToSqlString();
|
|
// 构建需要替换的字段名映射(只处理实际有差异的字段)
|
var nameMap = entityInfo.Columns
|
.Where(c => !string.Equals(c.PropertyName, c.DbColumnName, StringComparison.OrdinalIgnoreCase))
|
.ToDictionary(k => k.PropertyName.ToLower(), v => v.DbColumnName, StringComparer.OrdinalIgnoreCase);
|
if (nameMap.Count == 0) return queryable.ToSqlString();
|
|
// 预编译正则表达式提升性能
|
var sql = queryable.ToSqlString();
|
foreach (var kv in nameMap)
|
{
|
sql = Regex.Replace(sql, $@"\b{kv.Key}\b", kv.Value ?? kv.Key, RegexOptions.IgnoreCase | RegexOptions.Compiled); // 单词边界匹配
|
}
|
return sql;
|
}
|
|
#endregion 视图操作
|
}
|