protected CSFilter BuildRelationFilter(string tableAlias)
{
if (tableAlias == null)
{
tableAlias = "";
}
else
{
tableAlias += ".";
}
if (Relation != null)
{
CSParameterCollection parameters = new CSParameterCollection();
switch (Relation.RelationType)
{
case CSSchemaRelationType.OneToMany:
{
CSParameter csParameter = parameters.Add();
csParameter.Value = RelationObject.Data["#" + Relation.LocalKey].Value;
return(new CSFilter("{" + tableAlias + Relation.ForeignKey + "}=" + csParameter.Name, parameters));
}
case CSSchemaRelationType.ManyToMany:
{
if (Relation.ForeignKey == null)
{
Relation.ForeignKey = Schema.KeyColumns[0].Name;
}
if (Relation.ForeignLinkKey == null)
{
Relation.ForeignLinkKey = Relation.ForeignKey;
}
CSParameter csParameter = parameters.Add();
csParameter.Value = RelationObject.Data["#" + Relation.LocalKey].Value;
return(new CSFilter("{" + tableAlias + Relation.ForeignKey + "} $in ($select {" + Relation.ForeignLinkKey + "} $from [" + Relation.LinkTable + "] where {" + Relation.LocalLinkKey + "}=" + csParameter.Name + ")", parameters));
}
}
}
return(CSFilter.None);
}
/// <summary>
/// Physically deletes the object from the database
/// </summary>
/// <returns><c>true</c> if the object was deleted successfully. Otherwise <c>false</c></returns>
public bool Delete()
{
if (_dataState == CSObjectDataState.Deleted || _dataState == CSObjectDataState.New)
{
return(false);
}
bool cancel = false;
Fire_ObjectDeleting(ref cancel);
if (cancel)
{
return(false);
}
StringBuilder whereClause = new StringBuilder();
CSParameterCollection parameters = new CSParameterCollection();
foreach (CSSchemaColumn schemaColumn in _schema.Columns)
{
if (!schemaColumn.IsKey)
{
continue;
}
CSParameter parameter = parameters.Add();
parameter.Value = _fieldData["#" + schemaColumn.Name].ValueDirect;
if (whereClause.Length > 0)
{
whereClause.Append(" and ");
}
whereClause.Append(_schema.DB.QuoteField(schemaColumn.Name) + "=@" + parameter.Name.Substring(1));
}
if (whereClause.Length == 0)
{
throw new CSException("No key fields");
}
using (CSTransaction csTransaction = new CSTransaction(_schema))
{
string deleteSql = _schema.DB.BuildDeleteSQL(_schema.TableName, null, whereClause.ToString());
int numDeleted = _schema.DB.ExecuteNonQuery(deleteSql, parameters);
if (numDeleted == 1)
{
csTransaction.Commit();
}
else
{
return(false);
}
}
_dataState = CSObjectDataState.Deleted;
Fire_ObjectDeleted();
return(true);
}
private bool Create()
{
CSParameterCollection parameters = new CSParameterCollection();
List <string> fieldNames = new List <string>();
List <string> fieldValues = new List <string>();
List <string> sequenceNames = new List <string>();
foreach (CSSchemaColumn schemaColumn in _schema.Columns)
{
CSFieldValue fieldValue = _fieldData["#" + schemaColumn.Name];
if (fieldValue == null)
{
continue;
}
CSSchemaField schemaField = fieldValue.SchemaField;
if (schemaField.ClientGenerated && schemaColumn.IsKey)
{
if (schemaField.FieldType == typeof(Guid))
{
fieldValue.Value = Guid.NewGuid();
}
}
else
{
if (string.IsNullOrEmpty(schemaField.SequenceName) && (!fieldValue.IsDirty || schemaField.ReadOnly || schemaField.NoCreate || schemaColumn.Identity))
{
continue;
}
}
if (schemaField.ServerGenerated && schemaColumn.IsKey)
{
continue;
}
if (!string.IsNullOrEmpty(schemaField.SequenceName))
{
sequenceNames.Add(schemaField.SequenceName);
fieldValues.Add(null);
}
else
{
CSParameter parameter = parameters.Add();
parameter.Value = fieldValue.ValueDirect;
fieldValues.Add("@" + parameter.Name.Substring(1));
sequenceNames.Add(null);
}
fieldNames.Add(schemaColumn.Name);
}
string[] primaryKeys = new string[_schema.KeyColumns.Count];
for (int i = 0; i < _schema.KeyColumns.Count; i++)
{
primaryKeys[i] = _schema.KeyColumns[i].Name;
}
using (ICSDbReader reader = _schema.DB.ExecuteInsert(_schema.TableName, fieldNames.ToArray(), fieldValues.ToArray(), primaryKeys, sequenceNames.ToArray(), (_schema.IdentityColumn != null && _schema.IdentityColumn.MappedField != null) ? _schema.IdentityColumn.Name : null, parameters))
{
if (reader != null && !reader.IsClosed && reader.Read())
{
FromDataReader(reader, null);
}
}
_dataState = CSObjectDataState.Loaded;
return(true);
}
private bool Write()
{
if (!_fieldData.IsDirty)
{
return(true);
}
if (_dataState == CSObjectDataState.Deleted)
{
return(false);
}
List <string> fieldNames = new List <string>();
List <string> fieldValues = new List <string>();
CSFilter whereClause = new CSFilter();
CSParameterCollection parameters = new CSParameterCollection();
foreach (CSSchemaColumn schemaColumn in _schema.Columns)
{
CSFieldValue fieldValue = _fieldData["#" + schemaColumn.Name];
if (!schemaColumn.IsKey && (fieldValue == null || !fieldValue.IsDirty || fieldValue.SchemaField.ReadOnly))
{
continue;
}
CSParameter parameter = parameters.Add();
parameter.Value = fieldValue.ValueDirect;
if (schemaColumn.IsKey)
{
whereClause = whereClause.And(_schema.DB.QuoteField(schemaColumn.Name) + "=@" + parameter.Name.Substring(1));
}
if (fieldValue.IsDirty && !fieldValue.SchemaField.ReadOnly && !schemaColumn.Identity && !schemaColumn.ReadOnly)
{
fieldNames.Add(schemaColumn.Name);
fieldValues.Add("@" + parameter.Name.Substring(1));
}
fieldValue.ValueState = CSFieldValueState.Read;
}
if (whereClause.Expression.Length == 0)
{
throw new CSException("No key fields");
}
if (fieldValues.Count > 0)
{
string sqlQuery = _schema.DB.BuildUpdateSQL(_schema.TableName, fieldNames.ToArray(), fieldValues.ToArray(), whereClause.Expression);
if (_schema.DB.ExecuteNonQuery(sqlQuery, parameters) != 1)
{
return(false);
}
}
return(true);
}
internal bool ReadFields(CSStringCollection columnList, CSStringCollection keyList, List <object> valueList)
{
List <string> fieldList = new List <string>();
List <string> aliasList = new List <string>();
Dictionary <string, string> fieldAliasMap = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
CSFilter whereClause = new CSFilter();
CSTable table = new CSTable(_schema);
CSParameterCollection parameters = new CSParameterCollection();
foreach (CSSchemaColumn schemaColumn in _schema.Columns)
{
if (keyList.Contains(schemaColumn.Name))
{
CSParameter parameter = parameters.Add();
parameter.Value = valueList[keyList.IndexOf(schemaColumn.Name)];
whereClause = whereClause.And(table.TableAlias + "." + _schema.DB.QuoteField(schemaColumn.Name) + "=" + parameter.Name);
_fieldData["#" + schemaColumn.Name].ValueDirect = parameter.Value;
_fieldData["#" + schemaColumn.Name].ValueState = CSFieldValueState.Read;
}
else if (columnList.Contains(schemaColumn.Name))
{
string alias = CSNameGenerator.NextFieldAlias;
fieldList.Add(table.TableAlias + "." + schemaColumn.Name);
aliasList.Add(alias);
fieldAliasMap[alias] = schemaColumn.Name;
}
}
/** Build query for prefetch of relations **/
CSJoinList joinList = new CSJoinList();
List <PrefetchField> prefetchFields = GetPrefetchFieldsOne(table, fieldList, aliasList, joinList, null);
if (whereClause.Expression.Length == 0)
{
return(false);
}
if (fieldList.Count == 0)
{
return(true);
}
string sqlQuery = _schema.DB.BuildSelectSQL(table.TableName, table.TableAlias, fieldList.ToArray(), aliasList.ToArray(), joinList.BuildJoinExpressions(), whereClause.Expression, null, 1, 1, true, false);
using (CSTransaction csTransaction = new CSTransaction(_schema))
{
using (ICSDbReader dataReader = _schema.DB.CreateReader(sqlQuery, parameters))
{
if (!dataReader.Read())
{
return(false);
}
FromDataReader(dataReader, fieldAliasMap);
foreach (PrefetchField prefetchField in prefetchFields)
{
ReadRelationToOne(prefetchField.SchemaField, dataReader, prefetchField.AliasMap);
}
}
csTransaction.Commit();
}
return(true);
}
