/// <summary>
///
/// </summary>
/// <param name="entity"></param>
/// <param name="output"></param>
/// <returns></returns>
public virtual string GenerateDelete(IEntityExplain entity, ParameterCollection output)
{
var conditions = entity.GetFieldValues(entity.GetKeys());
if (conditions == null || conditions.Any() == false)
{
throw new ArgumentException("该实体对象不包含主键信息，无法执行删除命令。");
}
return(_stmBuilder.Delete(entity, conditions, output, SqlOptions.None));
}
/// <summary>
///
/// </summary>
/// <param name="entity"></param>
/// <param name="output"></param>
/// <returns></returns>
public virtual string GenerateUpdate(IEntityExplain entity, ParameterCollection output)
{
if (entity.AnySetted() == false)
{
return(null);
}
var fields = entity.GetSettedFields();
var conditions = entity.GetFieldValues(entity.GetKeys());
if (conditions == null || conditions.Any() == false)
{
throw new ArgumentException("实体对象缺少主键值。");
}
var values = entity.GetFieldValues(fields.Where(x => entity.IsKey(x) == false));
return(_stmBuilder.Update(entity, values, conditions, output, SqlOptions.None));
}
/// <summary>
///
/// </summary>
/// <param name="entity"></param>
/// <param name="output"></param>
/// <param name="includeIncrement"></param>
/// <param name="incrementFieldName"></param>
/// <returns></returns>
public virtual string GenerateInsertOrUpdate(IEntityExplain entity, ParameterCollection output, bool includeIncrement, out bool hasIncrement, string incrementFieldName = null)
{
if (entity.AnySetted() == false)
{
hasIncrement = false;
return(null);
}
// 有增量标识的实体对象的特殊处理
if (entity.Increment != null)
{
// 实体对象如果包含主键信息，则只生成update语句,否则只生成insert语句。
var val = entity[entity.Increment.ColumnName];
if (val != null && val != DBNull.Value && DbValueCast.Cast <int>(val) >= entity.Increment.StartVal)
{
hasIncrement = false;
return(GenerateUpdate(entity, output));
}
else
{
return(GenerateInsert(entity, output, includeIncrement, out hasIncrement, incrementFieldName));
}
}
var keys = entity.GetKeys();
if (keys == null || keys.Length == 0)
{
throw new ArgumentException("实体对象缺少主键值。");
}
var conditions = entity.GetFieldValues(keys);
if (conditions == null || conditions.Any() == false)
{
throw new ArgumentException("实体对象缺少主键值。");
}
var ifConditionSql = _stmBuilder.QueryFormat(null, _stmBuilder.BuildField(keys[0]), _stmBuilder.BuildTableName(entity.TableName), _stmBuilder.Where(conditions, output, SqlOptions.None), null, null, null, SqlOptions.None);
var ifTrueSql = GenerateUpdate(entity, output);
var ifFalseSql = GenerateInsert(entity, output, includeIncrement, out hasIncrement, incrementFieldName);
return(_stmBuilder.IfExistsFormat(ifConditionSql, ifTrueSql, ifFalseSql, SqlOptions.None));
}