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- 增加 RawValueAttribute 实现自定义表达式时，使用原始值传入参数；

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- 增加 IEnumerable<(T1, T2)>.ContainsMany 扩展方法，实现自定义表达式解析多列无法 IN 的问题；
This commit is contained in:
28810
2019-12-08 00:03:35 +08:00
parent c942811548
commit 011cc8d0d8
6 changed files with 154 additions and 14 deletions
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7
FreeSql.DbContext/FreeSql.DbContext.xml
View File

@@ -110,13 +110,6 @@
清空状态数据
</summary>
</member>
<member name="M:FreeSql.DbSet`1.RemoveAsync(System.Linq.Expressions.Expression{System.Func{`0,System.Boolean}})">
<summary>
根据 lambda 条件删除数据
</summary>
<param name="predicate"></param>
<returns></returns>
</member>
<member name="M:FreeSql.DbSet`1.Add(`0)">
<summary>
添加

8
FreeSql.Tests/FreeSql.Tests/UnitTest2.cs
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@@ -252,6 +252,14 @@ namespace FreeSql.Tests
}
});
List<(Guid, DateTime)> contains2linqarr = new List<(Guid, DateTime)>();
Assert.Equal("SELECT 1 as1 FROM \"TestIgnoreDefaultValue\" a WHERE (1=0)", g.sqlite.Select<TestIgnoreDefaultValue>().Where(a => contains2linqarr.ContainsMany(a.Id, a.ct1)).ToSql(a => 1).Replace("\r\n", ""));
g.sqlite.Select<TestIgnoreDefaultValue>().Where(a => contains2linqarr.ContainsMany(a.Id, a.ct1)).ToList();
contains2linqarr.Add((Guid.NewGuid(), DateTime.Now));
contains2linqarr.Add((Guid.NewGuid(), DateTime.Now));
contains2linqarr.Add((Guid.NewGuid(), DateTime.Now));
g.sqlite.Select<TestIgnoreDefaultValue>().Where(a => contains2linqarr.ContainsMany(a.Id, a.ct1)).ToList();
var start = DateTime.Now.Date;
var end = DateTime.Now.AddDays(1).Date.AddMilliseconds(-1);

12
FreeSql/DataAnnotations/ExpressionCallAttribute.cs
View File

@@ -13,6 +13,13 @@ namespace FreeSql.DataAnnotations
public class ExpressionCallAttribute : Attribute
{
}
/// <summary>
/// 自定义表达式函数解析的时候，指定参数不解析 SQL，而是直接传进来
/// </summary>
[AttributeUsage(AttributeTargets.Parameter)]
public class RawValueAttribute : Attribute
{
}
public class ExpressionCallContext
{
@@ -37,6 +44,11 @@ namespace FreeSql.DataAnnotations
/// </summary>
public List<DbParameter> UserParameters { get; internal set; }
/// <summary>
/// 将 c# 对象转换为 SQL
/// </summary>
public Func<object, string> FormatSql { get; internal set; }
/// <summary>
/// 返回表达式函数表示的 SQL 字符串
/// </summary>

80
FreeSql/Extensions/FreeSqlGlobalExtensions.cs
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@@ -10,6 +10,7 @@ using System.Drawing;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;
using System.Threading;
public static partial class FreeSqlGlobalExtensions
@@ -261,5 +262,84 @@ public static partial class FreeSqlGlobalExtensions
return false;
}
/// <summary>
/// C#：从元组集合中查找 exp1, exp2 是否存在<para></para>
/// SQL： <para></para>
/// exp1 = that[0].Item1 and exp2 = that[0].Item2 OR <para></para>
/// exp1 = that[1].Item1 and exp2 = that[1].Item2 OR <para></para>
/// ... <para></para>
/// 注意：当 that 为 null 或 empty 时，返回 1=0
/// </summary>
/// <typeparam name="T1"></typeparam>
/// <typeparam name="T2"></typeparam>
/// <param name="that"></param>
/// <param name="exp1"></param>
/// <param name="exp2"></param>
/// <returns></returns>
[ExpressionCall]
public static bool ContainsMany<T1, T2>([RawValue] this IEnumerable<(T1, T2)> that, T1 exp1, T2 exp2)
{
if (expContext.IsValueCreated == false || expContext.Value == null || expContext.Value.ParsedContent == null)
return that?.Any(a => a.Item1.Equals(exp1) && a.Item2.Equals(exp2)) == true;
if (that?.Any() != true)
{
expContext.Value.Result = "1=0";
return false;
}
var sb = new StringBuilder();
var idx = 0;
foreach (var item in that)
{
if (idx++ > 0) sb.Append(" OR \r\n");
sb
.Append(expContext.Value.ParsedContent["exp1"]).Append(" = ").Append(expContext.Value.FormatSql(FreeSql.Internal.Utils.GetDataReaderValue(typeof(T1), item.Item1)))
.Append(" AND ")
.Append(expContext.Value.ParsedContent["exp2"]).Append(" = ").Append(expContext.Value.FormatSql(FreeSql.Internal.Utils.GetDataReaderValue(typeof(T2), item.Item2)));
}
expContext.Value.Result = sb.ToString();
return true;
}
/// <summary>
/// C#：从元组集合中查找 exp1, exp2 是否存在<para></para>
/// SQL： <para></para>
/// exp1 = that[0].Item1 and exp2 = that[0].Item2 and exp3 = that[0].Item3 OR <para></para>
/// exp1 = that[1].Item1 and exp2 = that[1].Item2 and exp3 = that[1].Item3 OR <para></para>
/// ... <para></para>
/// 注意：当 that 为 null 或 empty 时，返回 1=0
/// </summary>
/// <typeparam name="T1"></typeparam>
/// <typeparam name="T2"></typeparam>
/// <typeparam name="T3"></typeparam>
/// <param name="that"></param>
/// <param name="exp1"></param>
/// <param name="exp2"></param>
/// <param name="exp3"></param>
/// <returns></returns>
[ExpressionCall]
public static bool ContainsMany<T1, T2, T3>([RawValue] this IEnumerable<(T1, T2, T3)> that, T1 exp1, T2 exp2, T3 exp3)
{
if (expContext.IsValueCreated == false || expContext.Value == null || expContext.Value.ParsedContent == null)
return that.Any(a => a.Item1.Equals(exp1) && a.Item2.Equals(exp2) && a.Item3.Equals(exp3));
if (that.Any() == false)
{
expContext.Value.Result = "1=0";
return false;
}
var sb = new StringBuilder();
var idx = 0;
foreach (var item in that)
{
if (idx++ > 0) sb.Append(" OR \r\n");
sb
.Append(expContext.Value.ParsedContent["exp1"]).Append(" = ").Append(expContext.Value.FormatSql(FreeSql.Internal.Utils.GetDataReaderValue(typeof(T1), item.Item1)))
.Append(" AND ")
.Append(expContext.Value.ParsedContent["exp2"]).Append(" = ").Append(expContext.Value.FormatSql(FreeSql.Internal.Utils.GetDataReaderValue(typeof(T2), item.Item2)))
.Append(" AND ")
.Append(expContext.Value.ParsedContent["exp3"]).Append(" = ").Append(expContext.Value.FormatSql(FreeSql.Internal.Utils.GetDataReaderValue(typeof(T3), item.Item3)));
}
expContext.Value.Result = sb.ToString();
return true;
}
#endregion
}

44
FreeSql/FreeSql.xml
View File

@@ -204,6 +204,11 @@
注意：请使用静态方法、或者在类上标记
</summary>
</member>
<member name="T:FreeSql.DataAnnotations.RawValueAttribute">
<summary>
自定义表达式函数解析的时候，指定参数不解析 SQL，而是直接传进来
</summary>
</member>
<member name="P:FreeSql.DataAnnotations.ExpressionCallContext.DataType">
<summary>
数据库类型，可用于适配多种数据库环境
@@ -225,6 +230,11 @@
注意：本属性只有 Where 的表达式解析才可用
</summary>
</member>
<member name="P:FreeSql.DataAnnotations.ExpressionCallContext.FormatSql">
<summary>
将 c# 对象转换为 SQL
</summary>
</member>
<member name="P:FreeSql.DataAnnotations.ExpressionCallContext.Result">
<summary>
返回表达式函数表示的 SQL 字符串
@@ -2784,6 +2794,40 @@
<param name="end"></param>
<returns></returns>
</member>
<member name="M:FreeSqlGlobalExtensions.ContainsMany``2(System.Collections.Generic.IEnumerable{System.ValueTuple{``0,``1}},``0,``1)">
<summary>
C#：从元组集合中查找 exp1, exp2 是否存在<para></para>
SQL： <para></para>
exp1 = that[0].Item1 and exp2 = that[0].Item2 OR <para></para>
exp1 = that[1].Item1 and exp2 = that[1].Item2 OR <para></para>
... <para></para>
注意：当 that 为 null 或 empty 时，返回 1=0
</summary>
<typeparam name="T1"></typeparam>
<typeparam name="T2"></typeparam>
<param name="that"></param>
<param name="exp1"></param>
<param name="exp2"></param>
<returns></returns>
</member>
<member name="M:FreeSqlGlobalExtensions.ContainsMany``3(System.Collections.Generic.IEnumerable{System.ValueTuple{``0,``1,``2}},``0,``1,``2)">
<summary>
C#：从元组集合中查找 exp1, exp2 是否存在<para></para>
SQL： <para></para>
exp1 = that[0].Item1 and exp2 = that[0].Item2 and exp3 = that[0].Item3 OR <para></para>
exp1 = that[1].Item1 and exp2 = that[1].Item2 and exp3 = that[1].Item3 OR <para></para>
... <para></para>
注意：当 that 为 null 或 empty 时，返回 1=0
</summary>
<typeparam name="T1"></typeparam>
<typeparam name="T2"></typeparam>
<typeparam name="T3"></typeparam>
<param name="that"></param>
<param name="exp1"></param>
<param name="exp2"></param>
<param name="exp3"></param>
<returns></returns>
</member>
<member name="M:System.Linq.Expressions.LambadaExpressionExtensions.And``1(System.Linq.Expressions.Expression{System.Func{``0,System.Boolean}},System.Linq.Expressions.Expression{System.Func{``0,System.Boolean}})">
<summary>
使用 and 拼接两个 lambda 表达式

9
FreeSql/Internal/CommonExpression.cs
View File

@@ -553,15 +553,15 @@ namespace FreeSql.Internal
exp3.Method.GetCustomAttributes(typeof(ExpressionCallAttribute), true).Any()
))
{
var ecc = new ExpressionCallContext { DataType = _ado.DataType, UserParameters = tsc.dbParams == null ? null : new List<DbParameter>() };
var ecc = new ExpressionCallContext { DataType = _ado.DataType, UserParameters = tsc.dbParams == null ? null : new List<DbParameter>(), FormatSql = obj => formatSql(obj, null, null, null) };
var exp3MethodParams = exp3.Method.GetParameters();
var dbParamsIndex = tsc.dbParams?.Count;
ecc.ParsedContent.Add(exp3MethodParams[0].Name, ExpressionLambdaToSql(exp3.Arguments[0], tsc));
ecc.ParsedContent.Add(exp3MethodParams[0].Name, exp3MethodParams[0].GetCustomAttributes(typeof(RawValueAttribute), true).Any() ? null: ExpressionLambdaToSql(exp3.Arguments[0], tsc));
if (tsc.dbParams?.Count > dbParamsIndex) ecc.DbParameter = tsc.dbParams.Last();
List<DbParameter> oldDbParams = tsc.SetDbParamsReturnOld(null);
for (var a = 1; a < exp3.Arguments.Count; a++)
if (exp3.Arguments[a].Type != typeof(ExpressionCallContext))
ecc.ParsedContent.Add(exp3MethodParams[a].Name, ExpressionLambdaToSql(exp3.Arguments[a], tsc));
ecc.ParsedContent.Add(exp3MethodParams[a].Name, exp3MethodParams[a].GetCustomAttributes(typeof(RawValueAttribute), true).Any() ? null : ExpressionLambdaToSql(exp3.Arguments[a], tsc));
tsc.SetDbParamsReturnOld(oldDbParams);
var exp3InvokeParams = new object[exp3.Arguments.Count];
@@ -570,6 +570,9 @@ namespace FreeSql.Internal
if (exp3.Arguments[a].Type != typeof(ExpressionCallContext))
{
var eccContent = ecc.ParsedContent[exp3MethodParams[a].Name];
if (eccContent == null)
exp3InvokeParams[a] = Expression.Lambda(exp3.Arguments[a]).Compile().DynamicInvoke();
else
exp3InvokeParams[a] = Utils.GetDataReaderValue(exp3.Arguments[a].Type,
eccContent.StartsWith("N'") ?
eccContent.Substring(1).Trim('\'').Replace("''", "'") :