public static string BuildDeleteCommandContent <T>(T obj, string table, int prefix, out PropertyList properties)
{
SQLMetaField primaryKey = null;
foreach (FieldInfo field in typeof(T).GetFields())
{
bool isPrimary = false;
string name = field.Name;
foreach (Attribute attrib in Attribute.GetCustomAttributes(field))
{
if (attrib is SQLIgnore)
{
break;
}
else if (attrib is SQLPrimaryKey)
{
isPrimary = true;
}
else if (attrib is SQLPropertyName)
{
name = ((SQLPropertyName)attrib).Name;
}
}
if (isPrimary)
{
primaryKey = new SQLMetaField(name, -1, field);
break;
}
}
if (primaryKey == null)
{
throw new NoPrimaryKeyException();
}
string k1 = $"@{prefix}KEY";
string command = $"DELETE FROM `{table}` WHERE {primaryKey.Name}={k1};";
properties = new PropertyList();
properties.Add(k1, primaryKey.Field.GetValue(obj));
return(command);
}
public static MySqlCommand BuildDeleteCommand <T>(T obj, string table, MySqlConnection sqlConnection = null)
{
SQLMetaField primaryKey = null;
foreach (FieldInfo field in typeof(T).GetFields())
{
bool isPrimary = false;
string name = field.Name;
foreach (Attribute attrib in Attribute.GetCustomAttributes(field))
{
if (attrib is SQLIgnore)
{
break;
}
else if (attrib is SQLPrimaryKey)
{
isPrimary = true;
}
else if (attrib is SQLPropertyName)
{
name = ((SQLPropertyName)attrib).Name;
}
}
if (isPrimary)
{
primaryKey = new SQLMetaField(name, -1, field);
break;
}
}
if (primaryKey == null)
{
throw new NoPrimaryKeyException();
}
string command = $"DELETE FROM `{table}` WHERE {primaryKey.Name}=@KEY;";
MySqlCommand sqlCommand = (sqlConnection != null ? new MySqlCommand(command, sqlConnection) : new MySqlCommand(command));
sqlCommand.Parameters.AddWithValue("@KEY", primaryKey.Field.GetValue(obj));
return(sqlCommand);
}
public static string BuildUpdateCommandContent <T>(T obj, string table, int prefix, out PropertyList properties)
{
List <SQLMetaField> sqlMetas = new List <SQLMetaField>();
SQLMetaField primaryKey = null;
foreach (FieldInfo field in typeof(T).GetFields())
{
bool include = true;
string name = field.Name;
bool omitUpdate = false;
bool isPrimary = Attribute.IsDefined(field, typeof(SQLPrimaryKey));
foreach (Attribute attrib in Attribute.GetCustomAttributes(field))
{
if ((attrib is SQLOmit && !isPrimary) || attrib is SQLIgnore)
{
include = false;
break;
}
else if (attrib is SQLPropertyName)
{
name = ((SQLPropertyName)attrib).Name;
}
else if (attrib is SQLOmitUpdate)
{
omitUpdate = true;
}
}
if (include)
{
SQLMetaField meta = new SQLMetaField(name, sqlMetas.Count, field, omitUpdate);
if (isPrimary)
{
primaryKey = meta;
foreach (SQLMetaField SubMeta in sqlMetas.Where(x => string.Equals(x.Name, meta.Name, StringComparison.InvariantCultureIgnoreCase)))
{
sqlMetas.Remove(SubMeta);
break;
}
}
else
{
if (sqlMetas.Where(x => string.Equals(x.Name, name, StringComparison.InvariantCultureIgnoreCase)).Count() != 0)
{
continue;
}
sqlMetas.Add(new SQLMetaField(name, sqlMetas.Count, field));
}
}
}
sqlMetas.RemoveAll(x => x.OmitUpdate);
if (primaryKey == null)
{
throw new NoPrimaryKeyException();
}
string command = $"UPDATE `{table}` SET {string.Join(", ", sqlMetas.CastEnumeration(x => $"{x.Name}=@{x.Index}"))} WHERE {primaryKey.Name}=@KEY;";
properties = new PropertyList();
properties.Add($"@{prefix}KEY", primaryKey.Field.GetValue(obj));
foreach (SQLMetaField meta in sqlMetas)
{
properties.Add($"@{prefix}_{meta.Index}", meta.Field.GetValue(obj));
}
return(command);
}
public static MySqlCommand BuildUpdateCommand <T>(T obj, string table, MySqlConnection connection = null)
{
List <SQLMetaField> sqlMetas = new List <SQLMetaField>();
SQLMetaField primaryKey = null;
foreach (FieldInfo field in typeof(T).GetFields())
{
bool include = true;
string Name = field.Name;
bool omitUpdate = false;
bool isPrimary = Attribute.IsDefined(field, typeof(SQLPrimaryKey));
foreach (Attribute Attrib in Attribute.GetCustomAttributes(field))
{
if ((Attrib is SQLOmit && !isPrimary) || Attrib is SQLIgnore)
{
include = false;
break;
}
else if (Attrib is SQLPropertyName)
{
Name = ((SQLPropertyName)Attrib).Name;
}
else if (Attrib is SQLOmitUpdate)
{
omitUpdate = true;
}
}
if (include)
{
SQLMetaField meta = new SQLMetaField(Name, sqlMetas.Count, field, omitUpdate);
if (isPrimary)
{
primaryKey = meta;
foreach (SQLMetaField SubMeta in sqlMetas.Where(x => string.Equals(x.Name, meta.Name, StringComparison.InvariantCultureIgnoreCase)))
{
sqlMetas.Remove(SubMeta);
break;
}
}
else
{
if (sqlMetas.Where(x => string.Equals(x.Name, Name, StringComparison.InvariantCultureIgnoreCase)).Count() != 0)
{
continue;
}
sqlMetas.Add(new SQLMetaField(Name, sqlMetas.Count, field));
}
}
}
sqlMetas.RemoveAll(x => x.OmitUpdate);
if (primaryKey == null)
{
throw new NoPrimaryKeyException();
}
string Command = $"UPDATE `{table}` SET {string.Join(", ", sqlMetas.CastEnumeration(x => $"{x.Name}=@{x.Index}"))} WHERE {primaryKey.Name}=@KEY;";
MySqlCommand sqlCommand = (connection != null ? new MySqlCommand(Command, connection) : new MySqlCommand(Command));
sqlCommand.Parameters.AddWithValue("@KEY", primaryKey.Field.GetValue(obj));
foreach (SQLMetaField meta in sqlMetas)
{
sqlCommand.Parameters.AddWithValue($"@{meta.Index}", meta.Field.GetValue(obj));
}
return(sqlCommand);
}
