Added SelectByAttribute and DeleteByAttribute to QueryBuilder

master
Railz 6 years ago
parent ddb7f6dc89
commit 166956f10f

@ -37,6 +37,59 @@ namespace eu.railduction.netcore.dll.Database_Attribute_System
return BuildQuery(param); return BuildQuery(param);
} }
/// <summary>
/// Builds an SELECT-Sql-query based on an object<para/>
/// Object needs to have at least 1 attribute!
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="classObject">Given object (marked with Db-attributes)</param>
/// <param name="attributeNames">Attributes and/or foreignKeys to use in lookup</param>
/// <returns>SELECT-Sql-query</returns>
public static string SelectByAttribute<T>(T classObject, params string[] attributeNames)
{
Type classType = classObject.GetType();
// Get db-table-name from class
string tableName = Function.GetDbTableName(classType);
// Get class db-fields
Dictionary<string, object> dbPrimaryKeys = new Dictionary<string, object>() { };
Dictionary<string, object> dbAttributes = new Dictionary<string, object>() { };
Dictionary<string, object> dbForeignKeys = new Dictionary<string, object>() { };
Function.ReadDbClassFields(classObject, ref dbPrimaryKeys, ref dbAttributes, ref dbForeignKeys);
if (dbAttributes.Count == 0) throw new InvalidOperationException($"Cannot generate SQL-Query of '{classType.Name}'. No attribute found!");
Dictionary<string, object> attributes = new Dictionary<string, object>() { };
// Iterate through given names
foreach (string attributeName in attributeNames)
{
// Iterate through attributes of class
foreach (KeyValuePair<string, object> dbAttribute in dbAttributes)
{
// If its a match, copy it to list
if (dbAttribute.Key.ToLower() == attributeName.ToLower())
{
attributes.Add(dbAttribute.Key, dbAttribute.Value);
}
}
}
object[] param = new object[1];
if (attributeNames != null)
{
// Build where statements with primaryKey/s
param = DbFunction.BuildKeyEqualQuery(attributes, " AND ");
}
// Add SQL-command part
param[0] = $"SELECT * FROM {tableName} WHERE " + param[0];
// Build and return the query
return BuildQuery(param);
}
/// <summary> /// <summary>
/// Builds an UPDATE-Sql-query based on an object<para/> /// Builds an UPDATE-Sql-query based on an object<para/>
/// Object needs to have at least 1 primary-key! /// Object needs to have at least 1 primary-key!
@ -108,6 +161,59 @@ namespace eu.railduction.netcore.dll.Database_Attribute_System
return BuildQuery(paramWhere); return BuildQuery(paramWhere);
} }
/// <summary>
/// Builds an DELETE-Sql-query based on an object<para/>
/// Object needs to have at least 1 primary-key!
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="classObject">Given object (marked with Db-attributes)</param>
/// <param name="attributeNames">Attributes and/or foreignKeys to use in lookup</param>
/// <returns>DELETE-Sql-query</returns>
public static string DeleteByAttribute<T>(T classObject, params string[] attributeNames)
{
Type classType = classObject.GetType();
// Get db-table-name from class
string tableName = Function.GetDbTableName(classType);
// Get class db-fields
Dictionary<string, object> dbPrimaryKeys = new Dictionary<string, object>() { };
Dictionary<string, object> dbAttributes = new Dictionary<string, object>() { };
Dictionary<string, object> dbForeignKeys = new Dictionary<string, object>() { };
Function.ReadDbClassFields(classObject, ref dbPrimaryKeys, ref dbAttributes, ref dbForeignKeys);
if (dbAttributes.Count == 0) throw new InvalidOperationException($"Cannot generate SQL-Query of '{classType.Name}'. No attribute found!");
Dictionary<string, object> attributes = new Dictionary<string, object>() { };
// Iterate through given names
foreach (string attributeName in attributeNames)
{
// Iterate through attributes of class
foreach (KeyValuePair<string, object> dbAttribute in dbAttributes)
{
// If its a match, copy it to list
if (dbAttribute.Key.ToLower() == attributeName.ToLower())
{
attributes.Add(dbAttribute.Key, dbAttribute.Value);
}
}
}
object[] param = new object[1];
if (attributeNames != null)
{
// Build where statements with primaryKey/s
param = DbFunction.BuildKeyEqualQuery(attributes, " AND ");
}
// Add SQL-command part
param[0] = $"DELETE FROM {tableName} WHERE " + param[0];
// Build and return the query
return BuildQuery(param);
}
/// <summary> /// <summary>

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