Agile Web Development with Hobo Evarist Lobo [email_address]

Introduction Hobo is a rapid web application builder It uses Ruby on rails and several plugins Provides default user model and themes CRUD and AJAX support DRYML tagging language and libraries Easily customizable

Hobo is a rapid web application builder

It uses Ruby on rails and several plugins

Provides default user model and themes

CRUD and AJAX support

DRYML tagging language and libraries

Easily customizable

Prerequisites Assumes basic knowledge of web development, databases, Ruby and Rails For Windows: install InstantRails For MacOS X: install Locomotive Test that you have Ruby and Rails up and running

Assumes basic knowledge of web development, databases, Ruby and Rails

For Windows: install InstantRails

For MacOS X: install Locomotive

Test that you have Ruby and Rails up and running

Getting started Download hobo gem from hobocentral Install hobo gem

Download hobo gem from hobocentral

Install hobo gem

Create Application Skeleton hobo <appname> Runs Rails Runs Hobo App generator Default theme Basic user model

hobo <appname>

Runs Rails

Runs Hobo App generator

Default theme

Basic user model

Create MySQL Database Use phpmyadmin <appname>_development

Use phpmyadmin

<appname>_development

Create Model and Controller cd <appname>/script/generate hobo_model <model_name> creates basic files, unit tests and schema cd <appname>/script/generate hobo_model_controller <model_name> creates controller and helper classes

cd <appname>/script/generate hobo_model <model_name>

creates basic files, unit tests and schema

cd <appname>/script/generate hobo_model_controller <model_name>

creates controller and helper classes

Add Fields Add fields to your tables in the migrations scripts auto dates foreign keys are Hobo options rake db:migrate

Add fields to your tables in the migrations scripts

auto dates foreign keys are Hobo options

rake db:migrate

Create Object Relationships Advert belongs_to :user belongs_to :category set_creator_attr :user

Advert

belongs_to :user

belongs_to :category

set_creator_attr :user

Start the application Use Instant Rails Console to start application Login signup search Uses acts_as_authenticated plugin Scriptaculous AJAX editor

Use Instant Rails Console to start application

Login signup search

Uses acts_as_authenticated plugin

Scriptaculous AJAX editor

Customizing Application Using DRYML changing the index page each DRYML tag calls a Rails helper method changing generated page creating tags

Using DRYML

changing the index page

each DRYML tag calls a Rails helper method

changing generated page

creating tags

Hobo Rapid tags <index_page> <show_page> <new_page> <edit_page> <show_collection_page> <new_in_collection_page>

<index_page>

<show_page>

<new_page>

<edit_page>

<show_collection_page>

<new_in_collection_page>

Core and Common tags repeat panel show section maincol sidecol display_name object_link new_object_link count with join if else

repeat

panel

show

section

maincol

sidecol

display_name

object_link

new_object_link

count

with

join

if

else

Page navigation <page_nav> <first_page_link> <last_page_link> <next_page_link> <previous_page_link> <page_n_of_count>

<page_nav>

<first_page_link>

<last_page_link>

<next_page_link>

<previous_page_link>

<page_n_of_count>

CRUD buttons <create_button> <delete_button>

<create_button>

<delete_button>

Create your own tag ! def : Definition <def tag=&quot;my_tag&quot;>This is my tag</def> Use <my_tag/> Output This is my tag

def :

Definition

<def tag=&quot;my_tag&quot;>This is my tag</def> Use

<my_tag/> Output

This is my tag

Creating tags Tags with attributes The attributes become local variables inside the tag. Passing arbitrary values Implicit context

Tags with attributes

The attributes become local variables inside the tag.

Passing arbitrary values

Implicit context

Creating tag libraries Use <taglib> to load tags from another Dryml file Note that app/views/hobolib/application.dryml is implicitly imported into every Dryml template. You can load the tags from a directory or a Ruby module

Use <taglib> to load tags from another Dryml file

Note that app/views/hobolib/application.dryml is implicitly imported into every Dryml template.

You can load the tags from a directory or a Ruby module

Using Tags from Ruby Tags are just methods, they can be called from ERB scriptlets and from helpers. Call with parameters or content

Tags are just methods, they can be called from ERB scriptlets and from helpers.

Call with parameters or content

Modifying theme and stylesheet Look at screencast for example Many designs available at opendesigns.org

Look at screencast for example

Many designs available at opendesigns.org

Hosting your Applications Capistrano is a tool to deploy ruby applications Lots of plugins and tutorials exist to make your applications scale with memcache You can host your application with Amazon S3 and EC2

Capistrano is a tool to deploy ruby applications

Lots of plugins and tutorials exist to make your applications scale with memcache

You can host your application with Amazon S3 and EC2

Resources http://www.hobocentral.net Download plugin Look at screencasts for quickstart Read the blogs Read the forums

http://www.hobocentral.net

Download plugin

Look at screencasts for quickstart

Read the blogs

Read the forums

Contributing look at code in Trac Log bugs Send patches/bug fixes to Tom Locke Create documentation Create sample applications and tutorials

look at code in Trac

Log bugs

Send patches/bug fixes to Tom Locke

Create documentation

Create sample applications and tutorials

Thank You Thanks to Tom Locke and others for creating Hobo. Please email me your feedback at evarist@gmail.com

Thanks to Tom Locke and others for creating Hobo.

Please email me your feedback at evarist@gmail.com