Re: mysql-native Help required
On Friday, 23 October 2020 at 20:28:40 UTC, aberba wrote: On Thursday, 22 October 2020 at 18:43:40 UTC, Steven Schveighoffer wrote: [...] Was about to say that. Part of why I think some people hate OOP...due to misuse. All my MySQL projects have this getConnection() function. Hi All, Thank you very much, it resolved my issues. Vino.B
Re: mysql-native Help required
On Thursday, 22 October 2020 at 18:43:40 UTC, Steven
Schveighoffer wrote:
On 10/22/20 11:00 AM, Vino wrote:
[...]
Different error:
Row[] data = conn.query("SELECT * FROM hostlog").array;
This is trying to call mysql-native's UFCS query function on
Connections, which isn't valid. You need to call it on
conn.conn.
But there's no access to the private Connection conn inside the
Connections class. I'm not sure what the class is for anyway,
so it's hard for me to suggest a proper alternative. Are you
just trying to encapsulate the connection string? I'd suggest
instead of a whole class, just a factory function:
Connection getConnection()
{
return new Connection("...");
}
-Steve
Was about to say that. Part of why I think some people hate
OOP...due to misuse.
All my MySQL projects have this getConnection() function.
Re: mysql-native Help required
On 10/22/20 11:00 AM, Vino wrote:
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)
Different error:
Row[] data = conn.query("SELECT * FROM hostlog").array;
This is trying to call mysql-native's UFCS query function on
Connections, which isn't valid. You need to call it on conn.conn.
But there's no access to the private Connection conn inside the
Connections class. I'm not sure what the class is for anyway, so it's
hard for me to suggest a proper alternative. Are you just trying to
encapsulate the connection string? I'd suggest instead of a whole class,
just a factory function:
Connection getConnection()
{
return new Connection("...");
}
-Steve
Re: mysql-native Help required
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
Re: mysql-native Help required
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
Re: mysql-native Help required
On Thursday, 22 October 2020 at 11:04:53 UTC, Vino wrote:
class Connections
{
private Connection conn;
auto constr =
"host=localhost;port=3910;user=user;pwd=password#;db=testdb";
this.conn = new Connection(constr);
}
where Connections class constructor implemented?
mysql-native Help required
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";
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[]);
}
From,
Vino
