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Postgres SQL Database Sample

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This is a sample of howto Use Postgresql with Marinas-GUI

Is the same clients example adapted to use Tposgres classes from HBPGSQL library

It shows howto connect to an existing database , create a table and edit or delete records from it.

Note that you need to put your database , user and password in the correct variables.

Probably somebody could improve this sample , I am not an SQL guru....

Improvments and corrections would be accepted

Now Updated  ( code reduced and formated using hbformat )


Este es un ejemplo de como usar Postgresql con Marinas-GUI

Es el mismo ejemplo clients adaptado para usar las clases Tpostgres  provistas por la libreria HBPGSQL

Muestra como conectarse a una base de datos existente , crear una tabla y editar o borrar registros.

Notese que debera colocar los datos correctos de login y base de datos en las variables correspondientes.

Probablemente alguien pueda mejorar este ejemplo , no soy ningun guru del SQL ...

Se aceptan correcciones y mejoras :-)

 

Ahora fue actualizado ( codigo fue reducido y formateado para mejor lectura con hbformat )

 

Contact: bruno.luciani at gmail dot com

 

 

 

 

 

Here you can donwload prg code an Mip file to compile in Marinas-IDE

Take care with library names in windows , this project was tested on Linux Ubuntu 10.04 , some library

could have diferent name and location.

 

Aqui pueden descargar el codigo prg y su correpondiente archivo MIP para compilar en Marinas-IDE

Tengan en cuenta que el proyecto fue probado en Linux Ubuntu 10.04 , y las librerias a agregar en Windows

pueden diferir su nombre y ubicacion , especialmente la de postgres.

 

Linux

Download :  ClientsPG.rar

Windows

Download : ClientsPGWIN.rar

clientspg.prg - Postgres Database example for marinas
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/*
 * Borrowed from  simple.prg 14094 2010-03-07 18:03:17Z vszakats $
 * Adapted for Marinas-GUi by Bruno Luciani
 */
 
#include "marinas-gui.ch"
#include "common.ch"
 
#define DEMOTITLE "Multiplatform Postgres Demo"
 
REQUEST HB_LANG_ESWIN
REQUEST HB_CODEPAGE_ESWIN
 
 
Function Main ()
private oServer, oQuery, oRow, cQuery
 
cHost:="localhost"
cDatabase:="database" 
cUser:="user"
cPass:="password"
 
conectar()
 
HB_CDPSELECT('ESWIN')
HB_LANGSELECT('ESWIN')
 
REQUEST DBFCDX , DBFFPT
RDDSETDEFAULT( "DBFCDX" )
 
 
        SET ENTERTAB .T.        //  Replace  Minigui    SET NAVIGATION EXTENDED  
 
        lNewRecord := .F.
 
        ANNOUNCE RDDSYS
        REQUEST DBFCDX , DBFFPT
        RDDSETDEFAULT( "DBFCDX" )
        SET FILECASE LOWER
        SET DIRCASE LOWER
        SET DELETE ON
        SET DECIMALS TO 3
        SET FIXED ON
        SET DATE BRITISH
        SET DATE FORMAT TO "dd/mm/yyyy"
        SET SCOREBOARD OFF
        SET AUTOPEN OFF
 
 
// Main Window Creation
 
CREATE WINDOW d_window
      ROW 0
      COL 0
      WIDTH 800
      HEIGHT 600
      CAPTION DEMOTITLE
      ONINIT  {|| mg_Set( "d_window" , "Style_Grid_1" , "value" , 1 ) }
      ONRELEASE  {|| closebase() }
      ICON "resource/d_test.png"
      MAIN .T.
 
 
      mainmenu()
 
      mtoolbar()
 
      mstatusbar()
 
      creategrid()
 
      createbase()
 
      refresh()
 
      buttons()
 
 
   END WINDOW
 
   mg_Do( "d_window" , "center" )
 
   mg_Do( "d_window" , "activate" )
 
 
Return .T.
 
//Main menu creation function
 
Function mainmenu()
 
   CREATE MAIN MENU OF d_window
 
      CREATE POPUP "&ABM"
 
         CREATE ITEM "New Record"
            ONCLICK new()
            ITEMNAME item1
            FONTNAME "mg_monospace"
            PICTURE "resource/d_test.png"
         END ITEM
 
         CREATE ITEM "Edit Record"
            ONCLICK edit()
            FONTNAME "mg_monospace"
            PICTURE "resource/d_test.png"
         END ITEM
 
         SEPARATOR
 
         CREATE ITEM "Delete Record"
            ONCLICK DeleteItem()
            FONTNAME "mg_monospace"           
            CHECKED .T.
         END ITEM
 
         SEPARATOR
 
         CREATE ITEM "Exit"
            ONCLICK mg_Do( mg_GetLastActivatedWindowName() , "release" )
            PICTURE "resource/d_test_stop.png"
         END ITEM
 
      END POPUP
 
      CREATE POPUP "M&enu 2"
 
         CREATE ITEM "Item 1"
            ONCLICK mg_MsgInfo( "Click from Item 1" )
            PICTURE "resource/d_test.png"
         END ITEM
 
         CREATE ITEM "Item 2"
            ONCLICK mg_MsgInfo( "Click from Item 2" )
         END ITEM
 
         CREATE ITEM "Item 3 (CheckMark)"
            ONCLICK mg_MsgInfo( "Click from Item 3" )
         END ITEM
 
      END POPUP
 
      CREATE POPUP "&Help"
 
         CREATE ITEM "About"
            ONCLICK { || mg_MsgInfo("Marinas Version : "+mg_Version() ) }
            PICTURE "resource/d_test.png"
         END ITEM
 
      END POPUP
 
   END MENU
 
Return .T.
 
// Toolbar creation function
 
Function mtoolbar()
 
   CREATE TOOLBAR myTollbar
 
      TOOLTIP "ToolBar ToolTip"
 
 
      CREATE TOOLBUTTON ToolBar_Button_1
         CAPTION "Exit Demo"
         TOOLTIP "Button Exit Tooltip"
         ONCLICK mg_Do( "d_window" , "release" )
         PICTURE "resource/d_test_stop.png"
 
      END TOOLBUTTON
 
      TOOLBARSEPARATOR
 
      CREATE TOOLBUTTON ToolBar_Button_2
         CAPTION "Data Entry"
         TOOLTIP "Start Modal Window"
         ONCLICK  new()
         PICTURE "resource/d_window_modal.png"
      END TOOLBUTTON
 
      TOOLBARSEPARATOR
 
      CREATE TOOLBUTTON ToolBar_Button_4
         CAPTION "About"
         TOOLTIP "Button About Tooltip"
         ONCLICK mg_MsgInfo( mg_Version() )
         PICTURE "resource/d_test.png"
      END TOOLBUTTON
 
      TOOLBARSEPARATOR
 
   END TOOLBAR
 
Return .T.
 
// StatusBar creation function
 
Function mstatusbar()
 
   CREATE STATUSBAR
      CAPTION "Marinas-Gui StatusBar Ready !!!"
      TOOLTIP "StatusBar ToolTip"
   END STATUSBAR
 
Return .T.
 
// Edit window ( modal )
 
 
 
 
 
// Funcion que crea el Grid para el despligue de los datos de la base clientes
 
Function CreateGrid()
 
      CREATE GRID Style_Grid_1
             ROW    20
             COL    40
             WIDTH  680
             HEIGHT 300
             VALUE  1
             COLUMNWIDTHALL {30,60,150,90,120,120,90}
             COLUMNALIGNALL {"Qt_AlignRight","CENTER","CENTER","CENTER","CENTER","CENTER","CENTER"}
             BACKCOLOR {255,223,255}
             SELECTIONBACKCOLOR {255,0,0}
             COLUMNHEADERALL  {'Rec','Code','Name','Telephone ','Adress','City','Start Date'}
      END GRID
 
 
 
return .T.
 
// Main window edit button's creation
 
function buttons()
 
 
     CREATE BUTTON Style_Button_4
            ROW    450
            COL    540
            WIDTH  60
            HEIGHT 28
            CAPTION "New"
            ONCLICK new()
      END BUTTON
 
     CREATE BUTTON Style_Button_5
            ROW    450
            COL    620
            WIDTH  60
            HEIGHT 28
            CAPTION "Edit"
            ONCLICK Edit()
      END BUTTON
 
      CREATE BUTTON Style_Button_6
            ROW    450
            COL    700
            WIDTH  60
            HEIGHT 28
            CAPTION "Delete"
            ONCLICK DeleteItem()
      END BUTTON
 
return .T.
 
// Database Creation if not exist
 
Function createbase()
 
 
      IF oServer:TableExists( "clients" )
 
	  if mg_msgyesno("Do you like to start using a fresh database ?")
                  oQuery := oServer:Execute( "DROP TABLE clients")
//                mg_log(oQuery := oServer:Execute( "DROP TABLE clients" ),.T.,.T.,.T.)
		oQuery:Destroy()
 
	      Else  
               return
	  endif     
 
      endif       
 
      cQuery := "CREATE TABLE clients("
      cQuery += "     Codigo integer not null primary key, "
      cQuery += "     Nombre Varchar(40), "
      cQuery += "     Telefono varchar(15), "
      cQuery += "     Direccion varchar(30), "
      cQuery += "     Ciudad varchar(30), "
      cQuery += "     Fecha Date ) "
 
      oQuery := oServer:Query( cQuery )
 
      IF oQuery:neterr()
	  mg_log( hb_utf8tostr(oQuery:ErrorMsg()),.T.,.T.,.T. )
      ENDIF
 
      oQuery:Destroy()
 
 
 
      oServer:StartTransaction()
 
      FOR i := 1 TO  50
	  cQuery := "INSERT INTO clients(codigo, nombre, telefono, direccion, ciudad, fecha) " +;
		    "VALUES( " + str( i+1000 ) + " ,'Giuseppe Juliani','004568989899','Via Romana 8989','Florence','30-04-2011'"+" )"
//          mg_log:=(cQuery,.T.,.T.,.T.)
	  oQuery := oServer:Query( cQuery )
 
	  IF oQuery:neterr()
	    mg_log(hb_utf8tostr(oQuery:errorMsg()),.T.,.T.,.T.)
	  ENDIF
 
	  oQuery:destroy()
      NEXT
 
      oServer:Commit()
 
 
return .T.
 
   //New Record function ///////////////
 
FUNCTION new()
 
   lNewRecord := .T.
   load()
   refresh()
 
   RETURN
 
   // Data edit function
 
FUNCTION edit()
 
   lNewRecord := .F.
   load()
   refresh()
 
   RETURN
 
 
 
 
FUNCTION load()
 
   LOCAL item_grid := Array( 0 )
 
   IF !( lNewRecord )
 
      registro := mg_Get( "d_window", "Style_Grid_1", "value" )
 
      IF registro = 0
         mg_msginfo( "You need to select an item to edit", "Error Editing !" )
         RETURN
      ENDIF
 
      item_grid := item_grid := mg_Get( "d_window" , "Style_Grid_1" , "item" , registro )
 
      nRecord := item_grid[1]
      //   mg_log(str(nRecord))
      oQuery := oServer:Query( "SELECT codigo, nombre, telefono, direccion, ciudad , fecha FROM Clients" )
      oQuery:goto( nRecord )
 
   ENDIF
 
 
 
   CREATE WINDOW Modal_1
      ROW 0 ; COL 0
      WIDTH 400 ; HEIGHT 300
      CAPTION "Data Entry "+" - " + Time()
      BACKCOLOR { 219 , 244 , 208 }
      MODAL .T.
 
      CREATE KEY Plus
         ACTION {|| mg_Do( cWin , "Style_Button_1" , "ONCLICK" ) }
      END KEY
 
      CREATE FRAMEBOX Style_Frame_1
             ROW    5
             COL    10
             WIDTH  375
             HEIGHT 275
             CAPTION "Client"
      END FRAMEBOX
 
 
 
     CREATE BUTTON Style_Button_1
            ROW    230
            COL    310
            WIDTH  60
            HEIGHT 28
            CAPTION "Save"
            ONCLICK SaveData()
      END BUTTON
 
* Aca van los textbox
      CREATE LABEL Label_1
             ROW    20
             COL    20
             VALUE "Code:"
             AUTOSIZE .T.
             TRANSPARENT .F.
             TOOLTIP "Label Tooltip"
      END LABEL
 
 
      CREATE TEXTBOX Text_1
             ROW    20
             COL    80
             WIDTH  100
             HEIGHT 24
             ALIGN Qt_AlignRight
             TOOLTIP "Client Number"
             UPPERCASE  .T.
             MAXLENGTH 5
*             BACKCOLOR {0,0,0,}
*             VALUE  ""
      END TEXTBOX
 
 
      CREATE LABEL Label_2
             ROW    50
             COL    20
             VALUE "Name:"
             AUTOSIZE .T.
             TRANSPARENT .F.
             TOOLTIP "Label Tooltip"
      END LABEL
 
 
      CREATE TEXTBOX Text_2
             ROW    50
             COL    80
             WIDTH  200
             HEIGHT 24
             ALIGN Qt_AlignLeft
             TOOLTIP "Client Name"
             UPPERCASE  .T.
             MAXLENGTH 30
*             BACKCOLOR {0,0,0,}
*             VALUE  ""
      END TEXTBOX
 
      CREATE LABEL Label_3
             ROW    80
             COL    20
             VALUE "Telephone:"
             AUTOSIZE .T.
             TRANSPARENT .F.
             TOOLTIP "Label Tooltip"
      END LABEL
 
 
 
      CREATE TEXTBOX Text_3
             ROW    80
             COL    80
             WIDTH  150
             HEIGHT 24
             ALIGN Qt_AlignLeft
             TOOLTIP "Client Telephone"
             UPPERCASE  .T.
             MAXLENGTH 13
*             BACKCOLOR {0,0,0,}
*             VALUE  ""
      END TEXTBOX
 
      CREATE LABEL Label_4
             ROW    110
             COL    20
             VALUE "Adress:"
             AUTOSIZE .T.
             TRANSPARENT .F.
             TOOLTIP "Label Tooltip"
      END LABEL
 
 
      CREATE TEXTBOX Text_4
             ROW    110
             COL    80
             WIDTH  300
             HEIGHT 24
             ALIGN Qt_AlignLeft
             TOOLTIP "Client Adress"
             UPPERCASE  .T.
             MAXLENGTH 30
*             BACKCOLOR {0,0,0,}
*             VALUE  ""
      END TEXTBOX
 
      CREATE LABEL Label_5
             ROW    140
             COL    20
             VALUE "City:"
             AUTOSIZE .T.
             TRANSPARENT .F.
             TOOLTIP "Label Tooltip"
      END LABEL
 
 
      CREATE TEXTBOX Text_5
             ROW    140
             COL    80
             WIDTH  300
             HEIGHT 24
             ALIGN Qt_AlignLeft
             TOOLTIP "Client city"
             UPPERCASE  .T.
             MAXLENGTH 30
*             BACKCOLOR {0,0,0,}
*             VALUE  ""
      END TEXTBOX
 
      CREATE LABEL Label_6
             ROW    170
             COL    20
             VALUE "Fecha Ing.:"
             AUTOSIZE .T.
             TRANSPARENT .F.
             TOOLTIP "Label Tooltip"
      END LABEL
 
 
      CREATE TEXTBOX Text_6
             ROW    170
             COL    80
             WIDTH  100
             HEIGHT 24
             ALIGN Qt_AlignRight
             TOOLTIP "Client start date "
             UPPERCASE  .T.
             MAXLENGTH 8
*            BACKCOLOR {0,0,0,}
             VALUE  dtoc(date())
      END TEXTBOX
 
 
if !(lNewRecord)
 
 
   oRow := oQuery:getrow()
 
   mg_Set("Modal_1","text_1","value",str( oQuery:Fieldget( 1 )))
   mg_Set("Modal_1","text_2","value", oQuery:Fieldget( 2 ))
   mg_Set("Modal_1","text_3","value", oQuery:Fieldget( 3 ))
   mg_Set("Modal_1","text_4","value", oQuery:Fieldget( 4 ))
   mg_Set("Modal_1","text_5","value", oQuery:Fieldget( 5 ))
   mg_Set("Modal_1","text_6","value",Dtoc( oQuery:Fieldget( 6 )))
 
 
endif
 
  mg_Do("Modal_1","text_1","setfocus")
 
   END WINDOW
 
   mg_Do( "Modal_1" , "center" )
 
   mg_Do( "Modal_1" , "activate" )
 
 
 
 
 
return .T.
 
   // Save new or edited data  , depends on lNewRecord  variable
 
FUNCTION SaveData()
 
   IF ( lNewRecord )
 
      oRow := oQuery:Blank()
 
   ENDIF
 
   oRow:FieldPut( 1, Val( mg_get("Modal_1","text_1","value" ) ) )
   oRow:FieldPut( 2, mg_Get( "Modal_1","text_2","value" ) )
   oRow:FieldPut( 3, mg_Get( "Modal_1","text_3","value" ) )
   oRow:FieldPut( 4, mg_Get( "Modal_1","text_4","value" ) )
   oRow:FieldPut( 5, mg_Get( "Modal_1","text_5","value" ) )
   oRow:FieldPut( 6, CToD( mg_Get("Modal_1","text_6","value" ) ) )
 
 
   IF ( lNewRecord )
 
      oQuery:Append( oRow )
   ELSE
      oQuery:Update( oRow )
 
   ENDIF
 
   IF oQuery:NetErr()
      mg_log( hb_utf8tostr( oQuery:errorMsg() ), .T. , .F. , .F. )
   ENDIF
 
   oQuery:Destroy()
 
 
   mg_Do( "Modal_1", "Release" )
 
   RETURN .T.
 
   // Connect funtion to database in Postgres SQL server
 
FUNCTION conectar()
 
   oServer := TPQServer():New( cHost, cDatabase, cUser, cPass )
 
 
   IF oServer:NetErr()
      mg_log( hb_utf8tostr( oServer:errorMsg() ), .T. , .T. , .T. )
      QUIT
   ENDIF
 
   oServer:SetVerbosity( 2 )
   oServer:traceon( "simple.log" )
 
   RETURN
 
 
 
   // Open base function and index check
 
FUNCTION openbase()
 
   conectar()
 
   RETURN .T.
 
   // close database on main window release
 
FUNCTION closebase()
 
   oServer:Destroy()
   mg_msginfo( "Server Disconnected !", "Postgres Server" )
 
   RETURN .T.
 
   // Grid Data Refresh
 
FUNCTION refresh()
 
   LOCAL aStruct
 
   mg_Do( "d_window", "Style_Grid_1", "deleteallitems" )
 
   oQuery := oServer:Query( "SELECT codigo, nombre, telefono, direccion, ciudad , fecha FROM Clients ORDER by codigo" )
 
   DO WHILE ! oQuery:Eof()
 
      aData := { oQuery:RecNo(), oQuery:FieldGet( 1 ), oQuery:FieldGet( 2 ), oQuery:FieldGet( 3 ), oQuery:FieldGet( 4 ), oQuery:FieldGet( 5 ), oQuery:FieldGet( 6 ) }
 
      mg_Do( "d_window", "Style_Grid_1", "additem", aData )
 
      oQuery:Skip()
 
   ENDDO
 
   oQuery:Destroy()
 
   RETURN .T.
 
   // Item delete from Database function
 
FUNCTION DeleteItem()
 
   LOCAL item_grid := Array( 0 )
 
   registro := mg_Get( "d_window", "Style_Grid_1", "value" )
 
   IF registro = 0
      mg_msginfo( "You need to select an Item to delete", "Error deleting !" )
      RETURN
   ENDIF
 
 
   item_grid := mg_Get( "d_window" , "Style_Grid_1" , "item" , registro )
 
   nRecord := item_grid[1]
 
   mg_msginfo( "You try to delete Client " + hb_osnewline() + "Client: " + item_grid[3] + hb_osnewline() + "Record number: " + Str( item_grid[1] ) )
 
   oQuery := oServer:Query( "SELECT codigo, nombre, telefono, direccion, ciudad , fecha FROM Clients" )
   oQuery:goto( nRecord )
   oRow := oQuery:getrow()
 
   oQuery:Delete( oRow )
 
   IF oQuery:NetErr()
      mg_log( hb_utf8tostr( oQuery:errorMsg() ), .T. , .F. , .F. )
   ENDIF
 
   oQuery:Destroy()
 
   refresh()
 
   RETURN
 
   
 
Last Updated on Thursday, 23 February 2012 03:51  

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