Getting started with web2py framework

    Full Stack web development with Python (Web2Py)
    How to download and install web2py
1.  Go  to http://web2py.com/

2.   Down load latest version http://web2py.com/init/default/download

     Unzip the downloaded file

     CliCk on the Web2py.exe file to it will open the window like below

           Provide the password(any password) and start the server

           Server has been started. Now we need to create a application using web2py framework.

           http://localhost:8000

                                                

         Click on the Admin,  which is there on the right side in the page. And provide the password which      we have given while starting the server

                After Successful Login,  page will be open like below.

               Create a new application using this framework- > New simple application –

       Application Name - ex: sivaweb2py

              Click on the create button. Now we have created application successfully.

               Need to run the application

               http://localhost:8000/sivaweb2py

               

              Now we need to write sample code in this application. So we need to understand basics of  the
       framework

               Need to edit the application

      This framework will follow MVC architecture

          Model- Contains db details

         Controller – Method and logic details

         Views – Html input/output to the user

Now we need to create one controller and respective views

Click on the Create button under Controller Section

I have given controller name as basics – basics.py will be created under controller

       Now edit the controller – Click on the basics.py

     def helloworld():
     msg= "Hello welcome to basics controller!"
     return locals()

 In the above code helloworld is method name . Copy the code and paste the same in your file.

  Save the file and go to back – by click on the back buton

  Now we need to create a  view- under Views section

  View name should be as method name  ex: basics/helloworld

   {{extend 'layout.html'}}

    This is our first web page
   {{ =msg}}

   Writing first web2py is very easy

                          

   http://localhost:8000/sivaweb2py/basics/helloworld

        

                               

Getting started with Oracle Stored Procedure and parse clob xml data and cursor

This Post will having the details to create stored procedure in oracle and parsing the clob data through stored procedure.

employee.xml
-------------


  siva
  32
  M

Above xml will be stored as clob data in Person table

Person table Schema -

Id NUMBER,
Name Varchar2(50),
employee_details clob

Above xml will be stored as clob data in Person table

create table PERSON (Id NUMBER, Name varchar2(50), employee_details clob);
  create table EMPLOYEE (Name varchar2(50), age NUMBER ,sex varchar2(10));

We need to parse the clob data using oracle procedure

create or replace PROCEDURE SP_PARSE_CLOB (person_id NUMBER) AS
  PERSION_ID Person.id%type;
  PERSON_NAME Person.name%type;
  EMPLOYEE_DETAILS Person.employee_details%type;
  name varchar2(50);
  age varchar2(50);
  sex varchar2(50);
  EMPLOYEE_exc EXCEPTION;
  -- Create a cursor
 cursor personDataCursor IS SELECT id, Name,employee_details from PERSON;
 BEGIN
   OPEN personDataCursor;
 LOOP
 FETCH personDataCursor into PERSION_ID,PERSON_NAME,EMPLOYEE_DETAILS;
 EXIT WHEN personDataCursor%notfound;
 IF XMLTYPE(EMPLOYEE_DETAILS).existSNode('/Employee/name/text()') > 0 THEN
   name := XMLTYPE(EMPLOYEE_DETAILS).extract('/Employee/name/text()').getStringVal();
 END IF;
 IF XMLTYPE(EMPLOYEE_DETAILS).existSNode('/Employee/age/text()') > 0 THEN
  age := XMLTYPE(EMPLOYEE_DETAILS).extract('/Employee/age/text()').getStringVal();
 END IF;
 IF XMLTYPE(EMPLOYEE_DETAILS).existSNode('/Employee/sex/text()') > 0 THEN
  sex := XMLTYPE(EMPLOYEE_DETAILS).extract('/Employee/sex/text()').getStringVal();
 END IF;
 dbms_output.put_line('Name:'|| name|| ' ' || 'Age:' || ' ' ||age || ' ' || 'Sex:' || ' ' || sex);
 -- Inset into another table
BEGIN
  insert into EMPLOYEE(name,age,sex) values(name,age,sex);
 EXCEPTION
    WHEN OTHERS
   THEN
    RAISE EMPLOYEE_exc;
  END;
  commit;
  END LOOP;

EXCEPTION
    WHEN EMPLOYEE_exc
      THEN
        rollback;
     -- Do what ever you want like insert log details in any another table
    commit;
    DBMS_OUTPUT.PUT_LINE ('Insertion failed in EMPLOYEE : '|| '' || name);
    END;