/**
* Delete the referenced rows of baseObj in intermediate join tables(Many2Many condition).
*
* @param baseObj The record to delete. Now contains associations info.
* @return The number of rows affected in all intermediate join tables.
*/
private int deleteAssociatedJoinTableRows(DataSupport baseObj) {
int rowsAffected = 0;
Set<String> associatedTableNames = baseObj.getAssociatedModelsMapForJoinTable().keySet();
for (String associatedTableName : associatedTableNames) {
String joinTableName =
DBUtility.getIntermediateTableName(baseObj.getTableName(), associatedTableName);
String fkName = getForeignKeyColumnName(baseObj.getTableName());
rowsAffected +=
mDatabase.delete(joinTableName, fkName + " = " + baseObj.getBaseObjId(), null);
}
return rowsAffected;
}
/**
* Analyze the associations of modelClass and store the associated tables. The associated tables
* might be used when deleting referenced data of a specified row.
*
* @param modelClass To get associations of this class.
*/
private void analyzeAssociations(Class<?> modelClass) {
Collection<AssociationsInfo> associationInfos = getAssociationInfo(modelClass.getName());
for (AssociationsInfo associationInfo : associationInfos) {
String associatedTableName =
DBUtility.getTableNameByClassName(associationInfo.getAssociatedClassName());
if (associationInfo.getAssociationType() == Const.Model.MANY_TO_ONE
|| associationInfo.getAssociationType() == Const.Model.ONE_TO_ONE) {
String classHoldsForeignKey = associationInfo.getClassHoldsForeignKey();
if (!modelClass.getName().equals(classHoldsForeignKey)) {
getForeignKeyTableToDelete().add(associatedTableName);
}
} else if (associationInfo.getAssociationType() == Const.Model.MANY_TO_MANY) {
String joinTableName =
DBUtility.getIntermediateTableName(getTableName(modelClass), associatedTableName);
joinTableName = BaseUtility.changeCase(joinTableName);
getForeignKeyTableToDelete().add(joinTableName);
}
}
}
