/// <summary>
/// 根据主键删除实体
/// </summary>
/// <param name="entity"></param>
/// <returns></returns>
internal static string DeleteByKey(this AttrEntityBase entity, string PrimaryFiled = null)
{
StringBuilder sql = new StringBuilder();
sql.Append($"Delete FROM {entity.GetType().Name} Where ");
if (string.IsNullOrEmpty(PrimaryFiled))
{
foreach (var prop in entity.GetType().GetProperties())
{
if (string.IsNullOrEmpty(PrimaryFiled))
{
if (prop.Name.ToUpper() == "ID" || prop.Name.ToUpper().EndsWith("ID"))
{
PrimaryFiled = prop.Name;
//sql.Append($"{PrimaryFiled}=@{PrimaryFiled}");
break;
}
}
}
}
if (string.IsNullOrEmpty(PrimaryFiled))
{
throw new AttrSqlException("删除实体失败:未找到主键字段，请配置要删除的主键字段");
}
sql.Append($"{PrimaryFiled}=@{PrimaryFiled}");
return(sql.ToString());
}
/// <summary>
/// 根据指定的字段删除
/// </summary>
/// <param name="entity"></param>
/// <returns></returns>
internal static string DeleteByCondition(this AttrEntityBase entity, string[] condition)
{
if (condition == null || condition.Length == 0)
{
throw new AttrSqlException("未设置删除条件！");
}
StringBuilder sql = new StringBuilder();
sql.Append($"Delete FROM {entity.GetType().Name} Where ");
for (int i = 0; i < condition.Length; i++)
{
sql.Append($"{condition[i]} = @{condition[i]}");
if (i < condition.Length - 1)
{
sql.Append(" AND ");
}
}
return(sql.ToString());
}
internal static string InsertEntity(this AttrEntityBase entity)
{
StringBuilder sql = new StringBuilder();
sql.Append($"INSERT INTO {entity.GetType().Name}");
sql.Append("(");
foreach (var prop in entity.GetType().GetProperties())
{
sql.Append($"`{prop.Name}`,");
}
sql.Remove(sql.Length - 1, 1);
sql.Append(")");
sql.Append("VALUES");
sql.Append("(");
foreach (var prop in entity.GetType().GetProperties())
{
sql.Append($"@{prop.Name},");
}
sql.Remove(sql.Length - 1, 1);
sql.Append(")");
return(sql.ToString());
}
/// <summary>
/// 根据主键更新
/// 若不指定主键，则第一个包含ID的字段为主键
/// </summary>
/// <param name="entity"></param>
/// <returns></returns>
internal static string UpdateField(this AttrEntityBase entity, string PrimaryKey = "")
{
StringBuilder sql = new StringBuilder();
sql.Append($"Update {entity.GetType().Name} SET ");
string Primary = PrimaryKey;
foreach (var prop in entity.GetType().GetProperties())
{
//存一下主键字段(默认名字为ID的或者以ID结尾的)
if (string.IsNullOrEmpty(Primary))
{
if (prop.Name.ToUpper() == "ID" || prop.Name.ToUpper().EndsWith("ID"))
{
Primary = prop.Name;
//主键字段不做更新，直接跳出
continue;
}
}
if (prop.Name.ToUpper() == PrimaryKey.ToUpper())
{
continue;
}
sql.Append($"{prop.Name} = @{prop.Name},");
}
if (sql.ToString() == $"Update {entity.GetType().Name} SET ")
{
return(string.Empty);
}
sql = sql.Remove(sql.Length - 1, 1);
if (string.IsNullOrEmpty(Primary))
{
throw new AttrSqlException($"未找到{entity.GetType().Name}表包含ID的主键字段,更新失败！");
}
sql.Append($" Where {Primary} = @{Primary}");
return(sql.ToString());
}
/// <summary>
/// 软删除
/// </summary>
/// <param name="entity"></param>
/// <param name="softDeleteField"></param>
/// <param name="value"></param>
/// <param name="IngnorIntDefault">忽略int类型的默认值0</param>
/// <returns></returns>
internal static string SoftDeleteByCondition(this AttrEntityBase entity, string softDeleteField, int value = 0, string PrimaryKey = "", bool IngnorIntDefault = true)
{
if (string.IsNullOrEmpty(softDeleteField))
{
throw new AttrSqlException("未设置软删除字段！");
}
StringBuilder sql = new StringBuilder();
sql.Append($"Update {entity.GetType().Name} SET {softDeleteField}={value}, ");
string Primary = PrimaryKey;
foreach (var prop in entity.GetType().GetProperties())
{
//存一下主键字段(默认名字为ID的或者以ID结尾的)
if (string.IsNullOrEmpty(Primary))
{
if (prop.Name.ToUpper() == "ID" || prop.Name.ToUpper().EndsWith("ID"))
{
Primary = prop.Name;
//主键字段不做更新，直接跳出
continue;
}
}
//软删除、主键字段也跳过，以参数为准
if (prop.Name.ToUpper() == softDeleteField.ToUpper() || prop.Name.ToUpper() == PrimaryKey.ToUpper())
{
continue;
}
//判断实体是否标记了AllowUpdateEmpty属性
//if (prop.IsDefined(typeof(AllowUpdateEmptyAttribute), true))
//{
// sql.Append($"{prop.Name} = @{prop.Name},");
// continue;
//}
bool isnull = false;
//判断当前属性是否有值(主要针对string、int和数组类型)
object objvalue = prop.GetValue(entity, null);
if (objvalue == null)
{
continue;
}
if (objvalue is string && string.IsNullOrEmpty((string)objvalue))
{
isnull = true;
}
else if ((objvalue is int && (int)objvalue == 0) || (objvalue is long && (long)objvalue == 0) || (objvalue is byte && (byte)objvalue == 0))
{
if (IngnorIntDefault)
{
isnull = true;
}
}
else if (objvalue is DateTime && (DateTime)objvalue == default(DateTime))
{
isnull = true;
}
else if (objvalue is Array)
{
Array array = (Array)objvalue;
if (array == null || array.Length == 0)
{
isnull = true;
}
}
//对有值的进行操作
if (!isnull)
{
sql.Append($"{prop.Name} = @{prop.Name},");
}
}
if (sql.ToString() == $"Update {entity.GetType().Name} SET ")
{
return(string.Empty);
}
sql = sql.Remove(sql.Length - 1, 1);
if (string.IsNullOrEmpty(Primary))
{
throw new AttrSqlException($"未找到{entity.GetType().Name}表包含ID的主键字段,更新失败！");
}
sql.Append($" Where {Primary} = @{Primary}");
return(sql.ToString());
}
/// <summary>
/// 根据实体配置为更新条件获取需要更新的字段
/// </summary>
/// <param name="entity"></param>
/// <param name="IngnorIntDefault"></param>
/// <returns></returns>
internal static string UpdateFieldByEntityCondition(this AttrBaseModel dto, AttrEntityBase entity, bool IngnorIntDefault = true)
{
StringBuilder sql = new StringBuilder();
sql.Append($"Update {entity.GetType().Name} SET ");
List <string> condition = new List <string>();
foreach (var prop in dto.GetType().GetProperties())
{
if (prop.IsDefined(typeof(UpdateConditionFieldAttribute), true))
{
condition.Add(prop.Name);
}
else
{
//判断实体是否标记了AllowUpdateEmpty属性
//if (prop.IsDefined(typeof(AllowUpdateEmptyAttribute), true))
//{
// sql.Append($"{prop.Name} = @{prop.Name},");
// continue;
//}
bool isnull = false;
//判断当前属性是否有值(主要针对string、int和数组类型)
object objvalue = prop.GetValue(dto, null);
if (objvalue == null)
{
continue;
}
if (objvalue is string && string.IsNullOrEmpty((string)objvalue))
{
isnull = true;
}
else if ((objvalue is int && (int)objvalue == 0) || (objvalue is long && (long)objvalue == 0) || (objvalue is byte && (byte)objvalue == 0))
{
if (IngnorIntDefault)
{
isnull = true;
}
}
else if (objvalue is DateTime && (DateTime)objvalue == default(DateTime))
{
isnull = true;
}
else if (objvalue is Array)
{
Array array = (Array)objvalue;
if (array == null || array.Length == 0)
{
isnull = true;
}
}
//对有值的进行操作
if (!isnull)
{
sql.Append($"{prop.Name} = @{prop.Name},");
}
}
}
if (sql.ToString() == $"Update {entity.GetType().Name} SET ")
{
return(string.Empty);
}
sql = sql.Remove(sql.Length - 1, 1);
if (condition.Count == 0)
{
throw new AttrSqlException($"未找到{entity.GetType().Name}表的更新条件,更新失败！");
}
sql.Append(" WHERE ");
for (var i = 0; i < condition.Count; i++)
{
sql.Append($"{condition[i]} = @{condition[i]}");
if (i + 1 < condition.Count)
{
sql.Append(" AND ");
}
}
return(sql.ToString());
}
