/// <summary>
/// 获取最小值
/// </summary>
/// <typeparam name="TResult"></typeparam>
/// <typeparam name="T"></typeparam>
/// <param name="queryable"></param>
/// <param name="minField">列</param>
/// <returns></returns>
public static object Min <T>(this Queryable <T> queryable, Expression <Func <T, object> > expression)
{
ResolveExpress re = new ResolveExpress();
var minField = re.GetExpressionRightFiled(expression);
return(Min <T, object>(queryable, minField));
}
/// <summary>
/// 假删除，根据表达示
/// 使用说明::
/// FalseDelete《T》(new int[]{1,2,3})或者Delete《T》(3)
/// </summary>
/// <param name="field">更新删除状态字段</param>
/// <param name="expression">筛选表达示</param>
public bool FalseDelete <T>(string field, Expression <Func <T, bool> > expression)
{
Type type = typeof(T);
string typeName = type.Name;
typeName = GetTableNameByClassType(typeName);
//属性缓存
string cachePropertiesKey = "db." + typeName + ".GetProperties";
var cachePropertiesManager = CacheManager <PropertyInfo[]> .GetInstance();
PropertyInfo[] props = null;
if (cachePropertiesManager.ContainsKey(cachePropertiesKey))
{
props = cachePropertiesManager[cachePropertiesKey];
}
else
{
props = type.GetProperties();
cachePropertiesManager.Add(cachePropertiesKey, props, cachePropertiesManager.Day);
}
bool isSuccess = false;
ResolveExpress re = new ResolveExpress();
re.ResolveExpression(re, expression);
string sql = string.Format("UPDATE {0} SET {1}=1 WHERE 1=1 {2}", typeName, field, re.SqlWhere);
int deleteRowCount = ExecuteCommand(sql, re.Paras.ToArray());
isSuccess = deleteRowCount > 0;
return(isSuccess);
}
/// <summary>
/// 条件筛选 例如：expression 为 it=>it.a inValues值为 new string[]{"a" ,"b"} 生成的SQL就是 a in('a','b')
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="queryable"></param>
/// <param name="expression"></param>
/// <returns></returns>
public static Queryable <T> In <T, FieldType>(this Queryable <T> queryable, Expression <Func <T, object> > expression, params FieldType[] inValues)
{
ResolveExpress re = new ResolveExpress();
var InFieldName = re.GetExpressionRightFiled(expression);
return(In <T, FieldType>(queryable, InFieldName, inValues));
}
public void ResolveExpression(ResolveExpress re, Expression exp)
{
ResolveExpress.MemberType type = ResolveExpress.MemberType.None;
var expStr = exp.ToString();
var isNotBool = !expStr.Contains("True") && !expStr.Contains("False");
var isContainsNot = expStr.Contains("Not");
if (isContainsNot && expStr.IsMatch(@" => Not\(.+?\)") && !expStr.Contains("Contains"))
{
this.SqlWhere = string.Format(" AND {0}=0 or {0} is null ", Regex.Match(expStr, @" => Not\(.+\.(.+?)\)").Groups[1].Value);
}
else if (isNotBool)
{
this.SqlWhere = string.Format(" AND {0} ", re.CreateSqlElements(exp, ref type));
}
else
{
var isTrue = Regex.IsMatch(expStr, @"\=\> True$");
var isFalse = Regex.IsMatch(expStr, @"\=\> False$");
if (isFalse)
{
this.SqlWhere = string.Format(" AND 1<>1 ");
}
else if (isTrue)
{
}
else
{
this.SqlWhere = string.Format(" AND {0} ", re.CreateSqlElements(exp, ref type));
}
}
}
/// <summary>
/// 分组
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="queryable"></param>
/// <param name="groupFileds">如：id,name </param>
/// <returns></returns>
public static Queryable <T> GroupBy <T>(this Queryable <T> queryable, Expression <Func <T, object> > expression)
{
ResolveExpress re = new ResolveExpress();
var field = re.GetExpressionRightFiled(expression);
var pre = queryable.GroupBy.IsValuable() ? "," : "";
queryable.GroupBy += pre + field;
return(queryable);
}
/// <summary>
/// 排序
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="queryable"></param>
/// <param name="orderFileds">如：id asc,name desc </param>
/// <returns></returns>
public static Queryable <T> OrderBy <T>(this Queryable <T> queryable, Expression <Func <T, object> > expression, OrderByType type = OrderByType.asc)
{
ResolveExpress re = new ResolveExpress();
var field = re.GetExpressionRightFiled(expression);
var pre = queryable.OrderBy.IsValuable() ? "," : "";
queryable.OrderBy += pre + field + " " + type.ToString().ToUpper();
return(queryable);
}
/// <summary>
/// 条件筛选 例如：InFieldName 为 a inValues 值为 new string[]{"a" ,"b"} 生成的SQL就是 a in('a','b')
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="queryable"></param>
/// <param name="expression"></param>
/// <returns></returns>
public static Queryable <T> In <T, FieldType>(this Queryable <T> queryable, string InFieldName, params FieldType[] inValues)
{
var type = queryable.Type;
queryable.WhereIndex = queryable.WhereIndex + 100;
ResolveExpress re = new ResolveExpress(queryable.WhereIndex);
queryable.Where.Add(string.Format(" AND {0} IN ({1})", InFieldName, inValues.ToJoinSqlInVal()));
return(queryable);
}
/// <summary>
/// 解析表达式
/// </summary>
/// <param name="re">当前解析对象</param>
/// <param name="exp">要解析的表达式</param>
/// <param name="db">数据库访问对象</param>
public void ResolveExpression(ResolveExpress re, Expression exp, SqlSugarClient db)
{
DB = db;
//初始化表达式
Init(re, exp);
//设置PageSize
foreach (var par in Paras)
{
SqlSugarTool.SetParSize(par);
}
}
/// <summary>
/// 返回序列的唯一元素；如果该序列并非恰好包含一个元素，则会引发异常。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="queryable"></param>
/// <param name="expression"></param>
/// <returns></returns>
public static T Single <T>(this Queryable <T> queryable, Expression <Func <T, bool> > expression)
{
var type = queryable.Type;
queryable.WhereIndex = queryable.WhereIndex + 100;
ResolveExpress re = new ResolveExpress(queryable.WhereIndex);
re.ResolveExpression(re, expression);
queryable.Where.Add(re.SqlWhere);
queryable.Params.AddRange(re.Paras);
return(queryable.ToList().Single());
}
/// <summary>
/// 确定序列是否包含任何元素。
/// </summary>
/// <typeparam name="T">表实体类型</typeparam>
/// <param name="queryable">查询对象</param>
/// <param name="expression">表达式条件</param>
/// <returns>count>0返回true</returns>
public static bool Any <T>(this Queryable <T> queryable, Expression <Func <T, bool> > expression)
{
var type = queryable.Type;
queryable.WhereIndex = queryable.WhereIndex + 100;
ResolveExpress re = new ResolveExpress(queryable.WhereIndex);
re.ResolveExpression(re, expression, queryable.DB);
queryable.WhereValue.Add(re.SqlWhere);
queryable.Params.AddRange(re.Paras);
return(queryable.Count() > 0);
}
/// <summary>
/// 条件筛选
/// </summary>
/// <typeparam name="T">表实体类型</typeparam>
/// <typeparam name="T2">表实体类型</typeparam>
/// <typeparam name="T3">表实体类型</typeparam>
/// <typeparam name="T4">表实体类型</typeparam>
/// <typeparam name="T5">表实体类型</typeparam>
/// <param name="queryable">查询对象</param>
/// <param name="expression">表达式条件</param>
/// <returns>Queryable</returns>
public static Queryable <T> Where <T, T2, T3, T4, T5>(this Queryable <T> queryable, Expression <Func <T, T2, T3, T4, T5, bool> > expression)
{
var type = queryable.Type;
queryable.WhereIndex = queryable.WhereIndex + 100;
ResolveExpress re = new ResolveExpress(queryable.WhereIndex);
re.Type = ResolveExpressType.nT;
re.ResolveExpression(re, expression, queryable.DB);
queryable.Params.AddRange(re.Paras);
queryable.WhereValue.Add(re.SqlWhere);
return(queryable);
}
/// <summary>
/// 删除,根据表达示
/// 使用说明:
/// Delete《T》(it=>it.id=100) 或者Delete《T》(3)
/// </summary>
/// <param name="expression">筛选表达示</param>
public bool Delete <T>(Expression <Func <T, bool> > expression)
{
Type type = typeof(T);
string typeName = type.Name;
typeName = GetTableNameByClassType(typeName);
ResolveExpress re = new ResolveExpress();
re.ResolveExpression(re, expression);
string sql = string.Format("DELETE FROM {0} WHERE 1=1 {1}", typeName, re.SqlWhere);
bool isSuccess = ExecuteCommand(sql, re.Paras.ToArray()) > 0;
return(isSuccess);
}
/// <summary>
/// 初始化表达式
/// </summary>
/// <param name="re"></param>
/// <param name="exp"></param>
private void Init(ResolveExpress re, Expression exp)
{
ResolveExpress.MemberType type = ResolveExpress.MemberType.None;
//解析表达式
this.SqlWhere = string.Format(" AND {0} ", re.CreateSqlElements(exp, ref type, true));
//还原bool值
foreach (var item in ConstantBoolDictionary)
{
if (this.SqlWhere.IsValuable())
{
this.SqlWhere = this.SqlWhere.Replace(item.Key.ToString(), item.ConditionalValue);
}
}
}
/// <summary>
/// 联表查询
/// </summary>
/// <typeparam name="T">第一个表的对象</typeparam>
/// <typeparam name="T2">联接表的对象</typeparam>
/// <typeparam name="T3">联接表的对象</typeparam>
/// <param name="queryable">查询对象</param>
/// <param name="expression">条件表达式</param>
/// <param name="type">Join的类型</param>
/// <returns>Queryable</returns>
public static Queryable <T> JoinTable <T, T2, T3>(this Queryable <T> queryable, Expression <Func <T, T2, T3, object> > expression, JoinType type = JoinType.LEFT)
{
queryable.DB.InitAttributes <T3>();
ResolveExpress re = new ResolveExpress();
queryable.WhereIndex = queryable.WhereIndex + 100;
re.Type = ResolveExpressType.nT;
var exLeftStr = Regex.Match(expression.ToString(), @"\((.+?)\).+").Groups[1].Value;
var exLeftArray = exLeftStr.Split(',');
var shortName1 = exLeftArray[1];
var shortName2 = exLeftArray[2];
re.ResolveExpression(re, expression, queryable.DB);
string joinTypeName = type.ToString();
string joinTableName = null;
if (queryable.DB._mappingTableList.IsValuable())
{
//别名表
if (queryable.DB._mappingTableList.IsValuable())
{
string name = typeof(T3).Name;
if (queryable.DB._mappingTableList.Any(it => it.Key == name))
{
joinTableName = queryable.DB._mappingTableList.First(it => it.Key == name).Value;
}
}
}
if (joinTableName.IsNullOrEmpty())
{
joinTableName = typeof(T3).Name;
}
string joinStr = string.Format(" {0} JOIN {1} {2} ON {3} ",
/*0*/ queryable.JoinTableValue.Count == 0 ? (" " + shortName1 + " " + joinTypeName) : joinTypeName.ToString(),
/*1*/ joinTableName.GetTranslationSqlName(),
/*2*/ shortName2,
/*3*/ re.SqlWhere.Trim().TrimStart('A').TrimStart('N').TrimStart('D')
);
queryable.JoinTableValue.Add(joinStr);
queryable.Params.AddRange(re.Paras);
return(queryable);
}
/// <summary>
/// 更新
/// 注意：rowObj为T类型将更新该实体的非主键所有列，如果rowObj类型为匿名类将更新指定列
/// 使用说明:sqlSugar.Update《T》(rowObj,whereObj);
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="rowObj">new T(){name="张三",sex="男"}或者new {name="张三",sex="男"}</param>
/// <param name="expression">it.id=100</param>
/// <returns></returns>
public bool Update <T>(object rowObj, Expression <Func <T, bool> > expression) where T : class
{
if (rowObj == null)
{
throw new ArgumentNullException("SqlSugarClient.Update.rowObj");
}
if (expression == null)
{
throw new ArgumentNullException("SqlSugarClient.Update.expression");
}
Type type = typeof(T);
string typeName = type.Name;
typeName = GetTableNameByClassType(typeName);
StringBuilder sbSql = new StringBuilder(string.Format(" UPDATE {0} SET ", typeName));
var rows = SqlSugarTool.GetParameters(rowObj);
string pkName = SqlSugarTool.GetPrimaryKeyByTableName(this, typeName);
foreach (var r in rows)
{
if (pkName == r.ParameterName.TrimStart('@'))
{
if (rowObj.GetType() == type)
{
continue;
}
}
sbSql.Append(string.Format(" `{0}` =@{0} ,", r.ParameterName.TrimStart('@')));
}
sbSql.Remove(sbSql.Length - 1, 1);
sbSql.Append(" WHERE 1=1 ");
ResolveExpress re = new ResolveExpress();
re.ResolveExpression(re, expression);
sbSql.Append(re.SqlWhere);;
List <MySqlParameter> parsList = new List <MySqlParameter>();
parsList.AddRange(re.Paras);
var pars = rows;
if (pars != null)
{
foreach (var par in pars)
{
parsList.Add(par);
}
}
try
{
var updateRowCount = ExecuteCommand(sbSql.ToString(), parsList.ToArray());
return(updateRowCount > 0);
}
catch (Exception ex)
{
var cacheManager = CacheManager <string> .GetInstance();
cacheManager.RemoveAll(it => it.Contains("KeyBy"));
throw new Exception("sql:" + sbSql.ToString() + "\n" + ex.Message);
}
}
