On Thursday, 22 October 2020 at 14:08:30 UTC, Steven
Schveighoffer wrote:
On 10/22/20 7:04 AM, Vino wrote:
Hi All,
Request your help on the below code as it is not working as
expected.
GetConnections.d
module common.GetConnections;
import mysql;
class Connections
{
private Connection conn;
auto constr =
"host=localhost;port=3910;user=user;pwd=password#;db=testdb";
I'd declare this immutable, so it's not stored in the class:
immutable constr = "...";
this.conn = new Connection(constr);
You are trying to assign an instance member at compile time,
with no actual instance.
You need a constructor
this() { this.conn = new Connection(constr); }
}
GetHost.d
import common.GetConnections;
import std.array : array;
import std.variant;
import mysql;
import std.stdio: writeln;
void main()
{
auto conn = new Connections();
Row[] data = conn.query("SELECT * FROM hostlog").array;
writeln(data[]);
}
The rest should work.
-Steve
Hi Steve,
Thank you very much, I tried your solution, still not working
File: GetConnections.d
module common.GetConnections;
import mysql;
class Connections
{
private Connection conn;
immutable constr =
"host=localhost;port=3910;user=user;pwd=password#;db=testdb";
this() { this.conn = new Connection(constr); }
}
Error:
source/common/GetHost.d(11,25): Error: none of the overloads of
query are callable using argument types (Connections, string),
candidates are:
/root/.dub/packages/mysql-native-3.0.0/mysql-native/source/mysql/commands.d(321,13):
mysql.commands.query(Connection conn, const(char[]) sql,
ColumnSpecialization[] csa = null)
/root/.dub/packages/mysql-native-3.0.0/mysql-native/source/mysql/commands.d(334,13):
mysql.commands.query(Connection conn, const(char[]) sql,
VariantN!32LU[] args)
/root/.dub/packages/mysql-native-3.0.0/mysql-native/source/mysql/commands.d(342,13):
mysql.commands.query(Connection conn, ref Prepared prepared)
/root/.dub/packages/mysql-native-3.0.0/mysql-native/source/mysql/commands.d(357,13):
mysql.commands.query(Connection conn, ref Prepared prepared,
VariantN!32LU[] args)
/root/.dub/packages/mysql-native-3.0.0/mysql-native/source/mysql/commands.d(364,13):
mysql.commands.query(Connection conn, ref BackwardCompatPrepared
prepared)
source/common/GetParams.d(11,25): ... (2 more, -v to show)
...
From,
Vino.B
