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PORuby with Sequel and Sinatra: form parameter passing
 

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  1. PORuby with Sequel and Sinatra: form parameter passing
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    <p>I am new to Ruby and Sinatra. I am attempting to pass parameters from an HTML form and insert them into a PostgreSQL database (on Heroku) with Sequel. </p> <p>The connection to the database works because I have succeeded with this code block</p> <pre><code>DB = Sequel.connect(connection_ credentials) insert_ds = DB["INSERT INTO users (email_address, username, password) VALUES ('email@email.com', 'my_username', 'my_password')"] insert_ds.insert </code></pre> <p>This works fine, but I cannot insert data from an HTML form. The data is not being passed. </p> <p>So, for example, this does not work</p> <pre><code>@email_address = params[:email_address] @username = params[:username] @password = params[:password] insert_ds = DB["INSERT INTO users (email_address, username, password) VALUES (@email_address, @username', @password)"] insert_ds.insert </code></pre> <p>The error message is</p> <blockquote> <p>Sequel::DatabaseError at / PG::Error: ERROR: column "email_address" does not exist LINE 1: ...sers (email_address, username, password) VALUES (@email_addr... ^ </p> </blockquote> <p>which leads me to presume that the parameter was not passed</p> <p>The full code is:</p> <pre><code>require 'sinatra' require "rubygems" require "sequel" require 'sinatra/sequel' require 'pg' DB = Sequel.connect('postgres://my username:my password@ec2-54-243-250-125.compute-1.amazonaws.com:5432/d70h0792oqobc') get '/' do #@users = users.all :order =&gt; :id.desc #@title = 'All Users' erb :index end post '/' do @email_address = params[:email_address] @username = params[:username] @password = params[:password] insert_ds = DB["INSERT INTO users (email_address, username, password) VALUES (@email_address, @username, @password)"] insert_ds.insert redirect '/' end __END__ @@ layout &lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt;&lt;/head&gt; &lt;body&gt; &lt;%= yield %&gt; &lt;/body&gt; &lt;/html&gt; @@index &lt;section id="add"&gt; &lt;form action="/" method="post"&gt; &lt;label class="label"&gt; &lt;span&gt;Email Address: &lt;/span&gt; &lt;/label&gt; &lt;input type="text" id="email_address" name="email_address" /&gt; &lt;label class="label"&gt; &lt;span&gt;Username: &lt;/span&gt; &lt;/label&gt; &lt;input type="text" id="username" name="username" /&gt; &lt;label class="label"&gt; &lt;span&gt;Password: &lt;/span&gt; &lt;/label&gt; &lt;input type="password" id="password" name="password" /&gt; &lt;input type="submit" value="Register me!"&gt; &lt;/form&gt; &lt;/section&gt; </code></pre> <p>Very grateful for all help!</p> <p>Thank you. </p>
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