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## v0.3.22
- 优化 导航属性 ManyToOne 名称查找规则； - 增加 IFreeSql.Aop 属性，未来所有拦截方法都在这里，第一期支持如下： * 监控 ToList 返回的的数据，用于拦截重新装饰； * 监视 Where，包括 select/update/delete，返回值 true 时可使上层不被执行； * 可自定义解析表达式； - 增加 ISelect.TractToList，用于单次跟踪或审核实体； - 优化 FreeSql.DbContext SaveChanges；
This commit is contained in:
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278
FreeSql.DbContext/EntityUtil.cs
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278
FreeSql.DbContext/EntityUtil.cs
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using FreeSql.Internal.Model;
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Reflection;
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using System.Text;
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namespace FreeSql.Extensions {
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public static class EntityUtilFreeSqlExtensions {
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static MethodInfo MethodStringBuilderAppend = typeof(StringBuilder).GetMethod("Append", new Type[] { typeof(object) });
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static MethodInfo MethodStringBuilderToString = typeof(StringBuilder).GetMethod("ToString", new Type[0]);
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static PropertyInfo MethodStringBuilderLength = typeof(StringBuilder).GetProperty("Length");
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static MethodInfo MethodStringConcat = typeof(string).GetMethod("Concat", new Type[] { typeof(object) });
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static ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Func<object, string>>> _dicGetEntityKeyString = new ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Func<object, string>>>();
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/// <summary>
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/// 获取实体的主键值，以 "*|_,[,_|*" 分割
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="_table"></param>
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/// <param name="item"></param>
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/// <returns></returns>
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public static string GetEntityKeyString<TEntity>(this IFreeSql orm, TEntity item, string splitString = "*|_,[,_|*") {
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var func = _dicGetEntityKeyString.GetOrAdd(orm.Ado.DataType, dt => new ConcurrentDictionary<Type, Func<object, string>>()).GetOrAdd(typeof(TEntity), t => {
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var _table = orm.CodeFirst.GetTableByEntity(t);
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var pks = _table.Primarys;
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var returnTarget = Expression.Label(typeof(string));
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var parm1 = Expression.Parameter(typeof(object));
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var var1Parm = Expression.Variable(t);
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var var2Sb = Expression.Variable(typeof(StringBuilder));
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var var3IsNull = Expression.Variable(typeof(bool));
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var exps = new List<Expression>(new Expression[] {
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Expression.Assign(var1Parm, Expression.TypeAs(parm1, t)),
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Expression.Assign(var2Sb, Expression.New(typeof(StringBuilder))),
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Expression.Assign(var3IsNull, Expression.Constant(false))
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});
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for (var a = 0; a < pks.Length; a++) {
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exps.Add(
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Expression.IfThen(
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Expression.Equal(var3IsNull, Expression.Constant(false)),
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Expression.IfThenElse(
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Expression.Equal(Expression.MakeMemberAccess(var1Parm, _table.Properties[pks[a].CsName]), Expression.Default(pks[a].CsType)),
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Expression.Assign(var3IsNull, Expression.Constant(true)),
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Expression.Block(
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new Expression[]{
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a > 0 ? Expression.Call(var2Sb, MethodStringBuilderAppend, Expression.Constant(splitString)) : null,
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Expression.Call(var2Sb, MethodStringBuilderAppend,
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Expression.Convert(Expression.MakeMemberAccess(var1Parm, _table.Properties[pks[a].CsName]), typeof(object))
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)
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}.Where(c => c != null).ToArray()
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)
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)
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)
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);
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}
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exps.Add(
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Expression.IfThen(
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Expression.Equal(var3IsNull, Expression.Constant(false)),
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Expression.Return(returnTarget, Expression.Call(var2Sb, MethodStringBuilderToString))
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)
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);
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exps.Add(Expression.Label(returnTarget, Expression.Default(typeof(string))));
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return Expression.Lambda<Func<object, string>>(Expression.Block(new[] { var1Parm, var2Sb, var3IsNull }, exps), new[] { parm1 }).Compile();
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});
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return func(item);
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}
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static ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Func<object, string>>> _dicGetEntityString = new ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Func<object, string>>>();
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/// <summary>
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/// 获取实体的所有数据，以 (1, 2, xxx) 的形式
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="_table"></param>
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/// <param name="item"></param>
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/// <returns></returns>
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public static string GetEntityString<TEntity>(this IFreeSql orm, TEntity item) {
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var func = _dicGetEntityString.GetOrAdd(orm.Ado.DataType, dt => new ConcurrentDictionary<Type, Func<object, string>>()).GetOrAdd(typeof(TEntity), t => {
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var _table = orm.CodeFirst.GetTableByEntity(t);
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var cols = _table.Columns;
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var returnTarget = Expression.Label(typeof(string));
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var parm1 = Expression.Parameter(typeof(object));
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var var1Parm = Expression.Variable(t);
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var var2Sb = Expression.Variable(typeof(StringBuilder));
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var var3IsNull = Expression.Variable(typeof(bool));
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var exps = new List<Expression>(new Expression[] {
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Expression.Assign(var1Parm, Expression.TypeAs(parm1, t)),
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Expression.Assign(var2Sb, Expression.New(typeof(StringBuilder))),
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Expression.Assign(var3IsNull, Expression.Constant(false)),
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Expression.Call(var2Sb, MethodStringBuilderAppend, Expression.Constant("(" ))
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});
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var a = 0;
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foreach (var col in cols.Values) {
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exps.Add(
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Expression.IfThen(
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Expression.Equal(var3IsNull, Expression.Constant(false)),
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Expression.IfThenElse(
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Expression.Equal(Expression.MakeMemberAccess(var1Parm, _table.Properties[col.CsName]), Expression.Default(col.CsType)),
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Expression.Assign(var3IsNull, Expression.Constant(true)),
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Expression.Block(
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new Expression[]{
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a > 0 ? Expression.Call(var2Sb, MethodStringBuilderAppend, Expression.Constant(", " )) : null,
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Expression.Call(var2Sb, MethodStringBuilderAppend,
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Expression.Convert(Expression.MakeMemberAccess(var1Parm, _table.Properties[col.CsName]), typeof(object))
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)
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}.Where(c => c != null).ToArray()
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)
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)
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)
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);
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a++;
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}
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exps.AddRange(new Expression[] {
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Expression.Call(var2Sb, MethodStringBuilderAppend, Expression.Constant(")" )),
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Expression.IfThen(
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Expression.Equal(var3IsNull, Expression.Constant(false)),
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Expression.Return(returnTarget, Expression.Call(var2Sb, MethodStringBuilderToString))
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)
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});
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exps.Add(Expression.Label(returnTarget, Expression.Default(typeof(string))));
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return Expression.Lambda<Func<object, string>>(Expression.Block(new[] { var1Parm, var2Sb, var3IsNull }, exps), new[] { parm1 }).Compile();
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});
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return func(item);
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}
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/// <summary>
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/// 使用新实体的值，复盖旧实体的值
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/// </summary>
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static ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Action<object, object>>> _dicCopyNewValueToEntity = new ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Action<object, object>>>();
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public static void CopyEntityValue<TEntity>(this IFreeSql orm, TEntity oldValue, TEntity newValue) {
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var func = _dicCopyNewValueToEntity.GetOrAdd(orm.Ado.DataType, dt => new ConcurrentDictionary<Type, Action<object, object>>()).GetOrAdd(typeof(TEntity), t => {
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var _table = orm.CodeFirst.GetTableByEntity(t);
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var parm1 = Expression.Parameter(typeof(object));
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var parm2 = Expression.Parameter(typeof(object));
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var var1Parm = Expression.Variable(t);
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var var2Parm = Expression.Variable(t);
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var exps = new List<Expression>(new Expression[] {
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Expression.Assign(var1Parm, Expression.TypeAs(parm1, t)),
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Expression.Assign(var2Parm, Expression.TypeAs(parm2, t))
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});
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foreach (var prop in _table.Properties.Values) {
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if (_table.ColumnsByCs.ContainsKey(prop.Name)) {
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exps.Add(
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Expression.Assign(
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Expression.MakeMemberAccess(var1Parm, prop),
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Expression.MakeMemberAccess(var2Parm, prop)
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)
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);
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} else {
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exps.Add(
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Expression.Assign(
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Expression.MakeMemberAccess(var1Parm, prop),
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Expression.Default(prop.PropertyType)
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)
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);
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}
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}
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return Expression.Lambda<Action<object, object>>(Expression.Block(new[] { var1Parm, var2Parm }, exps), new[] { parm1, parm2 }).Compile();
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});
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func(oldValue, newValue);
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}
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static ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Action<object, long>>> _dicSetEntityIdentityValue = new ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Action<object, long>>>();
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/// <summary>
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/// 设置实体的自增字段值（若存在）
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="orm"></param>
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/// <param name="item"></param>
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/// <param name="idtval"></param>
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public static void SetEntityIdentityValue<TEntity>(this IFreeSql orm, TEntity item, long idtval) {
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var func = _dicSetEntityIdentityValue.GetOrAdd(orm.Ado.DataType, dt => new ConcurrentDictionary<Type, Action<object, long>>()).GetOrAdd(typeof(TEntity), t => {
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var _table = orm.CodeFirst.GetTableByEntity(t);
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var identitys = _table.Primarys.Where(a => a.Attribute.IsIdentity);
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var parm1 = Expression.Parameter(typeof(object));
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var parm2 = Expression.Parameter(typeof(long));
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var var1Parm = Expression.Variable(t);
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var exps = new List<Expression>(new Expression[] {
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Expression.Assign(var1Parm, Expression.TypeAs(parm1, t))
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});
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foreach (var pk in identitys) {
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exps.Add(
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Expression.Assign(
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Expression.MakeMemberAccess(var1Parm, _table.Properties[pk.CsName]),
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Expression.Convert(FreeSql.Internal.Utils.GetDataReaderValueBlockExpression(pk.CsType, Expression.Convert(parm2, typeof(object))), pk.CsType)
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)
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);
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}
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return Expression.Lambda<Action<object, long>>(Expression.Block(new[] { var1Parm }, exps), new[] { parm1, parm2 }).Compile();
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});
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func(item, idtval);
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}
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static ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Action<object>>> _dicClearEntityPrimaryValueWithIdentityAndGuid = new ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Action<object>>>();
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/// <summary>
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/// 清除实体的主键值，将自增、Guid类型的主键值清除
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="orm"></param>
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/// <param name="item"></param>
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public static void ClearEntityPrimaryValueWithIdentityAndGuid<TEntity>(this IFreeSql orm, TEntity item) {
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var func = _dicClearEntityPrimaryValueWithIdentityAndGuid.GetOrAdd(orm.Ado.DataType, dt => new ConcurrentDictionary<Type, Action<object>>()).GetOrAdd(typeof(TEntity), t => {
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var _table = orm.CodeFirst.GetTableByEntity(t);
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var identitys = _table.Primarys.Where(a => a.Attribute.IsIdentity);
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var parm1 = Expression.Parameter(typeof(object));
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var var1Parm = Expression.Variable(t);
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var exps = new List<Expression>(new Expression[] {
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Expression.Assign(var1Parm, Expression.TypeAs(parm1, t))
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});
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foreach (var pk in _table.Primarys) {
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if (pk.CsType == typeof(Guid) || pk.CsType == typeof(Guid?) ||
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pk.Attribute.IsIdentity) {
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exps.Add(
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Expression.Assign(
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Expression.MakeMemberAccess(var1Parm, _table.Properties[pk.CsName]),
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Expression.Default(pk.CsType)
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)
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);
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}
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}
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return Expression.Lambda<Action<object>>(Expression.Block(new[] { var1Parm }, exps), new[] { parm1 }).Compile();
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});
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func(item);
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}
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static ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Func<object, object, bool, string[]>>> _dicCompareEntityValueReturnColumns = new ConcurrentDictionary<DataType, ConcurrentDictionary<Type, Func<object, object, bool, string[]>>>();
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/// <summary>
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/// 对比两个实体值，返回相同/或不相同的列名
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="orm"></param>
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/// <param name="up"></param>
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/// <param name="oldval"></param>
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/// <returns></returns>
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public static string[] CompareEntityValueReturnColumns<TEntity>(this IFreeSql orm, TEntity up, TEntity oldval, bool isEqual) {
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var func = _dicCompareEntityValueReturnColumns.GetOrAdd(orm.Ado.DataType, dt => new ConcurrentDictionary<Type, Func<object, object, bool, string[]>>()).GetOrAdd(typeof(TEntity), t => {
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var _table = orm.CodeFirst.GetTableByEntity(t);
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var returnTarget = Expression.Label(typeof(string[]));
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var parm1 = Expression.Parameter(typeof(object));
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var parm2 = Expression.Parameter(typeof(object));
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var parm3 = Expression.Parameter(typeof(bool));
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var var1Ret = Expression.Variable(typeof(List<string>));
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var var1Parm = Expression.Variable(t);
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var var2Parm = Expression.Variable(t);
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var exps = new List<Expression>(new Expression[] {
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Expression.Assign(var1Parm, Expression.TypeAs(parm1, t)),
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Expression.Assign(var2Parm, Expression.TypeAs(parm2, t)),
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Expression.Assign(var1Ret, Expression.New(typeof(List<string>)))
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});
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var a = 0;
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foreach (var prop in _table.Properties.Values) {
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if (_table.ColumnsByCs.TryGetValue(prop.Name, out var trycol) == false) continue;
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exps.Add(
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Expression.IfThenElse(
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Expression.Equal(
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Expression.MakeMemberAccess(var1Parm, prop),
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Expression.MakeMemberAccess(var2Parm, prop)
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),
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Expression.IfThen(
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Expression.IsTrue(parm3),
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Expression.Call(var1Ret, typeof(List<string>).GetMethod("Add", new Type[] { typeof(string) }), Expression.Constant(trycol.Attribute.Name))
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),
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Expression.IfThen(
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Expression.IsFalse(parm3),
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Expression.Call(var1Ret, typeof(List<string>).GetMethod("Add", new Type[] { typeof(string) }), Expression.Constant(trycol.Attribute.Name))
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)
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)
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);
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a++;
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}
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exps.Add(Expression.Return(returnTarget, Expression.Call(var1Ret, typeof(List<string>).GetMethod("ToArray", new Type[0]))));
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exps.Add(Expression.Label(returnTarget, Expression.Constant(new string[0])));
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return Expression.Lambda<Func<object, object, bool, string[]>>(Expression.Block(new[] { var1Ret, var1Parm, var2Parm }, exps), new[] { parm1, parm2, parm3 }).Compile();
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});
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return func(up, oldval, isEqual);
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}
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}
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}
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