Firebird News

Friday, November 21, 2014

Node.JS and Firebird driver (node-firebird-libfbclient) installing on Amazon EC2 instance

Here are the notes on Installing node.js module for firebird
I assume Firebird was installed from source or from tar.gz and in a linux instance


wget https://nodejs.org/dist/v4.6.0/node-v4.6.0.tar.gz
tar -zxvf node-v4.6.0.tar.gz
cd  node-v4.6.*
./configure 
sudo make install

Next is time to install the firebird module (Firebird was installed from source in /opt/firebird2.5.x)

git clone git://github.com/xdenser/node-firebird-libfbclient.git
cd node-firebird-lib
export PATH=$PATH:/opt/firebird2.5.x/binfbclient/

npm -g install

create firebird db and test table in /tmp/nodedb.fdb with isql or isql-fb

SQL>CREATE DATABASE "localhost:/tmp/nodedb.fdb" user 'SYSDBA' password '*********';
SQL> CREATE TABLE TEST (ID INT NOT NULL PRIMARY KEY, NAME VARCHAR(20));
SQL> create generator gen_test_id;
SQL> SET GENERATOR gen_test_id TO 10;
SQL> set term !! ;
SQL> CREATE TRIGGER TEST_BI FOR TEST
CON> ACTIVE BEFORE INSERT POSITION 0
CON> AS
CON> BEGIN
CON> if (NEW.ID is NULL) then NEW.ID = GEN_ID(GEN_TEST_ID, 1);
CON> END!!
SQL> set term ; !!

Then write the test.js script to connect to it



you can observe that the id is auto incremented if you run it multiple time

node test.js 
[ { ID: 5, NAME: 'new one' },
  { ID: 11, NAME: 'new one' },
  { ID: 12, NAME: 'new one' },
  { ID: 13, NAME: 'new one' },
  { ID: 14, NAME: 'new one' } ]

also in the name you can put later the
browser or the ip in one of the columns


We build now the version for the web modifying the hello world version adding the firebird database glue



you can run it with
 node firebird_example.js

Rails On Firebird - status and follow the guide

Rails On Firebird - you need to check that Firebird active record adapter and ruby driver are installed
Install Rails 4.x :
 gem install rails
Generate a new Firebird Rails application
rails new firebird_app 
delete the generated database.yml sqlite config and use the one from bellow
Be aware about indentation
cat config/database.yml

Edit the project Gemfile and add the activerecord-fb-adapter gem:
gem 'activerecord-fb-adapter'
Then run:
bundle update
 rails generate scaffold Client name:string address:string email:string remark:text
  rake db:migrate
I have re-read the ruby guide
so i did these commands while following the official guide
rake db:create
but database was already created in flamerobin
script/generate controller home index
vi app/views/home/index.html.erb
and write something there, start the server with
rails s
and now you can see something in browser
http://localhost:3000/


I have created the table and one sequence in firebird db
CREATE TABLE posts (
id BIGINT NOT NULL PRIMARY KEY,
name VARCHAR(255),
title VARCHAR(255),
content VARCHAR(255),
timestamps timestamp
);
CREATE sequence POSTS_SEQ;

I have ran the scaffold again to generate the posts model/view/controller
script/generate scaffold Post name:string title:string content:text
and then
started the server
rails s

Of course I have modified the route and added an link as in tutorial and now i can add and modify blog posts
note: in new rails route is defined this way in config/routes.rb
map.root :controller => "home"

http://localhost:3000/posts






Follow the normal ActiveRecord conventions for table names, primary key columns, etc. The one “extra” you’ll need for Firebird is that you’ll have to create a generator for any tables that require a sequence-based primary key. The default naming convention is TABLENAME_SEQ. So if you have a users table, you would need to create a corresponding USERS_SEQ generator

You don't need to create before insert triggers ! rails reads the value from sequence and then increments it in ruby code, Yay!