/// <summary>
/// 创建关联一个强类型查询
/// </summary>
/// <typeparam name="TJoin"></typeparam>
/// <typeparam name="TJoinResult"></typeparam>
/// <param name="resultSelect"></param>
/// <param name="expression"></param>
/// <param name="joinType"></param>
/// <returns></returns>
public LambdaQueryViewJoin <T, TJoin, TJoinResult> Join <TJoin, TJoinResult>(LambdaQueryResultSelect <TJoin, TJoinResult> resultSelect, Expression <Func <T, TJoinResult, bool> > expression, JoinType joinType = JoinType.Inner)
{
if (!resultSelect.BaseQuery.__FromDbContext)
{
throw new CRLException("关联需要由LambdaQuery.CreateQuery创建");
}
var query2 = new LambdaQueryViewJoin <T, TJoin, TJoinResult>(this, resultSelect);
var innerType = typeof(TJoin);
//__JoinTypes.Add(new TypeQuery(innerType, "T_" + prefixIndex), joinType);
var prefix1 = GetPrefix(innerType);
var prefix2 = GetPrefix(typeof(TJoinResult));
var typeQuery = new TypeQuery(innerType, prefix2);
var baseQuery = resultSelect.BaseQuery;
foreach (var kv in baseQuery.QueryParames)
{
QueryParames[kv.Key] = kv.Value;
}
string innerQuery = baseQuery.GetQuery();
typeQuery.InnerQuery = innerQuery;
string condition = FormatJoinExpression(expression.Body);
AddInnerRelation(typeQuery, joinType, condition);
return(query2);
}
/// <summary>
/// 创建关联一个强类型查询
/// </summary>
/// <typeparam name="TJoinResult"></typeparam>
/// <param name="resultSelect"></param>
/// <param name="expression"></param>
/// <param name="joinType"></param>
/// <returns></returns>
public ILambdaQueryViewJoin <T, TJoinResult> Join <TJoinResult>(ILambdaQueryResultSelect <TJoinResult> resultSelect, Expression <Func <T, TJoinResult, bool> > expression, JoinType joinType = JoinType.Inner)
{
if (!resultSelect.BaseQuery.__FromDbContext)
{
throw new Exception("关联需要由LambdaQuery.CreateQuery创建");
}
var query2 = new LambdaQueryViewJoin <T, TJoinResult>(this, resultSelect);
//var innerType = typeof(TSource);
var innerType = resultSelect.InnerType;
//var prefix1 = GetPrefix(innerType);
var prefix2 = GetPrefix(typeof(TJoinResult));
var typeQuery = new TypeQuery(innerType, prefix2);
var baseQuery = resultSelect.BaseQuery;
QueryParames.AddRange(baseQuery.QueryParames);
string innerQuery = baseQuery.GetQuery();
typeQuery.InnerQuery = innerQuery;
string condition = FormatJoinExpression(expression.Body);
AddInnerRelation(typeQuery, joinType, condition);
return(query2);
}
/// <summary>
/// 在Join后增加条件
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="expressionBody"></param>
internal void __JoinAfter <T>(Expression expressionBody)
{
string condition = FormatExpression(expressionBody).SqlOut;
condition = " and " + condition;
var innerType = typeof(T);
var typeQuery = new TypeQuery(innerType);
__Relations[typeQuery].condition += condition;
}
/// <summary>
/// 在Join后增加条件
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public LambdaQueryJoin <T, TJoin> JoinAfter(Expression <Func <TJoin, bool> > expression)
{
string condition = BaseQuery.FormatExpression(expression.Body).SqlOut;
condition = " and " + condition;
var innerType = typeof(TJoin);
var typeQuery = new TypeQuery(innerType);
BaseQuery.__Relations[typeQuery].condition += condition;
return(this);
}
//internal void AddInnerRelationCondition(TypeQuery inner, string condition)
//{
// __Relations[inner] += " and " + condition;
//}
internal void AddInnerRelation(TypeQuery typeQuery, JoinType joinType, string condition)
{
if (__Relations == null)
{
__Relations = new Dictionary <TypeQuery, JoinInfo>();
}
var inner = typeQuery.OriginType;
if (__Relations.ContainsKey(typeQuery))
{
throw new CRLException(string.Format("关联查询已包含关联对象 {0} {1}", inner, condition));
return;
}
//if (__MainType == inner)
//{
// throw new CRLException(string.Format("关联查询不能指定自已 {0} {1}" , inner,condition));
// return;
//}
if (inner.IsSubclassOf(typeof(IModel)))
{
DBExtendFactory.CreateDBExtend(__DbContext).CheckTableCreated(inner);
}
var tableName = TypeCache.GetTableName(inner, __DbContext);
string aliasName = GetPrefix(inner);
aliasName = aliasName.Substring(0, aliasName.Length - 1);
if (typeQuery.TypeQueryEnum == TypeQueryEnum.查询)
{
//查询别名按关联别名算
condition = condition.Replace(typeQuery.queryName2, aliasName + ".");
tableName = string.Format("({0}) {1} ", typeQuery.InnerQuery, aliasName);
}
else
{
tableName = string.Format("{0} {1} {2}", __DBAdapter.KeyWordFormat(tableName), aliasName, __DBAdapter.GetWithNolockFormat(__WithNoLock));
}
//string str = string.Format(" {0} join {1} on {2}", joinType, tableName, condition);
if (!__Relations.ContainsKey(typeQuery))
{
var join = new JoinInfo()
{
joinType = joinType, tableName = tableName, condition = condition
};
__Relations.Add(typeQuery, join);
}
}
internal void AddInnerRelationCondition(TypeQuery inner, string condition)
{
__Relations[inner] += " and " + condition;
}
