public SelectQuery <TPoco> Join(string forginColumnName,
[ValueProvider(nameof(JoinMode))] JoinMode joinAs = null)
{
var path = PropertyPath <TPoco>
.Get(ContainerObject.AccessLayer.Config, forginColumnName)
.Where(e => !typeof(IDbCollection).IsAssignableFrom(e.DeclaringType))
.Select(e =>
{
var dbClassInfoCache = ContainerObject.AccessLayer.GetClassInfo(e.DeclaringType);
if (dbClassInfoCache.Propertys.ContainsKey(e.Name))
{
return(new KeyValuePair <DbClassInfoCache, DbPropertyInfoCache>(dbClassInfoCache, dbClassInfoCache.Propertys[e.Name]));
}
else
{
throw new InvalidOperationException($"The expected property '{e.Name}' was not found.")
{
Data =
{
{ "Class", dbClassInfoCache }
}
};
}
})
.ToArray();
return(JoinOn(this, path, joinAs));
}
public SelectQuery <TPoco> Join(string forginColumnName,
[ValueProvider(nameof(JoinMode))] JoinMode joinAs = null)
{
var path = PropertyPath <TPoco>
.Get(ContainerObject.AccessLayer.Config, forginColumnName)
.Where(e => !typeof(IDbCollection).IsAssignableFrom(e.DeclaringType))
.Select(e =>
{
var dbClassInfoCache = ContainerObject.AccessLayer.GetClassInfo(e.DeclaringType);
return(new KeyValuePair <DbClassInfoCache, DbPropertyInfoCache>(dbClassInfoCache,
dbClassInfoCache.Propertys[e.Name]));
})
.ToArray();
return(JoinOn(path, joinAs));
}
internal static SelectQuery <TPoco> JoinOn(
IQueryBuilder builder,
KeyValuePair <DbClassInfoCache, DbPropertyInfoCache>[] path,
JoinMode joinAs = null,
Func <ConditionalEvalQuery <TPoco>, ConditionalEvalQuery <TPoco> > joinCondition = null)
{
joinAs = joinAs ?? JoinMode.Default;
IQueryBuilder target = builder;
var targetAlias = target.ContainerObject
.SearchLast <ISelectableQueryPart>(e => !(e is JoinTableQueryPart))
.Alias;
var parentJoinPart = builder.ContainerObject.Joins;
foreach (var keyValuePair in path)
{
var targetTable = target.ContainerObject.Search(targetAlias);
var pathOfJoin = target.ContainerObject.GetPathOf(targetAlias) + "." +
keyValuePair.Value.PropertyName;
var parentAlias = target.ContainerObject
.CreateTableAlias(pathOfJoin);
var joinExists = parentJoinPart.FirstOrDefault(e => e.Alias.Equals(parentAlias));
if (joinExists != null)
{
parentJoinPart = joinExists.DependingJoins;
targetAlias = parentAlias;
continue;
}
Type referenceType;
if (keyValuePair.Value.CheckForListInterface())
{
referenceType = keyValuePair.Value.PropertyType.GetElementType();
if (referenceType == null)
{
referenceType = keyValuePair.Value.PropertyType.GetGenericArguments().FirstOrDefault();
}
}
else
{
referenceType = keyValuePair.Value.PropertyType;
}
var referencedTypeCache = target.ContainerObject.AccessLayer.GetClassInfo(referenceType);
var targetAliasOfJoin = new QueryIdentifier
{
QueryIdType = QueryIdentifier.QueryIdTypes.Table,
Value = referencedTypeCache.TableName
};
ColumnInfo onSourceTableKey;
ColumnInfo selfPrimaryKey;
var referenceColumn = keyValuePair.Value.ForginKeyAttribute?.Attribute;
if (referenceColumn == null)
{
throw new InvalidOperationException("There is no known reference from table " +
$"'{keyValuePair.Key.Type}' " +
"to table " +
$"'{referenceType}'." +
"Use a ForeignKeyDeclarationAttribute to connect both");
}
var forginColumns = DbAccessLayer.GetSelectableColumnsOf(referencedTypeCache)
.Select(e => new ColumnInfo(e, parentAlias, target.ContainerObject))
.ToList();
selfPrimaryKey
= targetTable.Columns.FirstOrDefault(e => e.IsEquivalentTo(referenceColumn.ForeignKey));
onSourceTableKey
= forginColumns.FirstOrDefault(e => e.IsEquivalentTo(referenceColumn.ReferenceKey));
var joinTableQueryPart = new JoinTableQueryPart(
targetAliasOfJoin,
targetAlias,
parentAlias,
keyValuePair.Key.Type,
onSourceTableKey,
selfPrimaryKey,
forginColumns,
keyValuePair.Value,
joinAs);
parentJoinPart.Add(joinTableQueryPart.JoinParseInfo);
parentJoinPart = joinTableQueryPart.JoinParseInfo.DependingJoins;
target.ContainerObject.SearchLast <ISelectQueryPart>().AddJoin(joinTableQueryPart);
target = target.Add(joinTableQueryPart);
targetAlias = parentAlias;
}
if (joinCondition != null)
{
var lastJoin = target.ContainerObject.SearchLast <JoinTableQueryPart>();
var condition = new ConditionStatementQueryPart();
var tempSelect = new ConditionalEvalQuery <TPoco>(target.Add(condition));
joinCondition(tempSelect);
lastJoin.Condition = condition;
}
return(new SelectQuery <TPoco>(target));
}
