Ruakij/Database-Attribute_System
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Catching known errors that may occur whilst resolving unknown object

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This commit is contained in:
Railz 2019-07-11 12:42:13 +02:00
parent 1c2c8f6e76
commit 2f243e6ccf
1 changed files with 15 additions and 5 deletions
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20
Database-Attribute_System/ClassAction.cs
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@ -135,8 +135,15 @@ namespace eu.railduction.netcore.dll.Database_Attribute_System
if (!dataMatchFound) throw new InvalidOperationException($"PrimaryKey='{primaryKeyAtt.parentField.Name}' is missing.");
}
ResolveByPrimaryKey<T>(obj, queryExecutor);
try
{
ResolveByPrimaryKey<T>(obj, queryExecutor);
}catch(InvalidOperationException)
{
// If there is no result, return null
return default(T);
}
return obj;
}
@ -258,13 +265,16 @@ namespace eu.railduction.netcore.dll.Database_Attribute_System
/// <typeparam name="T"></typeparam>
/// <param name="classObject">Given object (marked with Db-attributes)</param>
/// <param name="queryExecutor">Function to handle query-calls - Has to return Dictionary[attributeName, attributeValue]</param>
public static void ResolveByPrimaryKey<T>(T classObject, Func<string, List<Dictionary<string, object>>> queryExecutor)
public static void ResolveByPrimaryKey<T>(T classObject, Func<string, List<Dictionary<string, object>>> queryExecutor, bool throwExceptions = true)
{
string query = QueryBuilder.SelectByPrimaryKey(classObject); // Generate query
List<Dictionary<string, object>> dataSet = queryExecutor(query); // Execute
if (dataSet.Count == 0) throw new InvalidOperationException($"Cannot fetch '{typeof(T).Name}' by primary key/s. No results!");
FillObject(classObject, dataSet[0]); // Fill the object
if (dataSet.Count == 0)
{
if (throwExceptions) throw new InvalidOperationException($"Cannot fetch '{typeof(T).Name}' by primary key/s. No results!");
}
else FillObject(classObject, dataSet[0]); // Fill the object
}
/// <summary>