Ruby on Rails每个... do循环显示哈希

Question

I'm building an app manage dentists and locations. I just finished the location show page and added code to display a list of all the practitioners at that location. However when I render the page, it is dumping the entire hash (locations.practitioner.each) above my formatted list. How do I make the hash go away?

Here's my show.html.erb

    <p>
  <b>Location name:</b>
  <%= @location.location_name %>
</p>
<p>
  <b>Location id:</b>
  <%= @location.id %>
</p>

<p><strong>Practitioners at this Location</strong></p>
<table>
  <tr>
    <th>First Name</th>
    <th>Last Name</th>
    <th>Role</th>
    <th>Production Goal</th>
    <th></th>

  </tr>

<%= @location.practitioner.each do |practitioner| %>
  <tr>
    <td><%= practitioner.first_name %></td>
    <td><%= practitioner.last_name %></td>
    <td><%= practitioner.role %></td>
    <td><%= practitioner.production_goal %></td>
    <td><%= link_to "Edit", edit_practitioner_path(practitioner) %></td>

  </tr> 
<% end %>
</table>

And here's how the page looks...

Location name: Waterview

Location id: 1

Practitioners at this Location

[#<Practitioner id: 1, first_name: "Dr. Robert", last_name: "Anjoux", role: "Dentist", production_goal: 10000, location_id: 1, created_at: "2013-03-26 17:34:38", updated_at: "2013-03-26 21:52:37">, 
#<Practitioner id: 3, first_name: "Smantha", last_name: "Hickleberry", role: "Hygenist", production_goal: 4800, location_id: 1, created_at: "2013-03-26 21:49:46", updated_at: "2013-03-26 21:49:46">, 
#<Practitioner id: 4, first_name: "Dr. Sandra", last_name: "Prenger", role: "Dentist", production_goal: 22000, location_id: 1, created_at: "2013-03-26 22:05:38", updated_at: "2013-03-26 22:05:38">]

**First Name    Last Name   Role    Production Goal**   
Dr. Robert  Anjoux          Dentist   10000                 Edit
Smantha     Hickleberry Hygenist   4800                 Edit
Dr. Sandra  Prenger         Dentist   22000                 Edit

What am I doing wrong? I just what the tabular list...

Dennis

Answer 1

This line is your problem. You are using the "=" sign which displays the output of the Ruby statement:

<%= @location.practitioner.each do |practitioner| %>

Change it to this:

<% @location.practitioner.each do |practitioner| %>

Answer 2

Write it without the '=' symbol:

<% @location.practitioner.each do |practitioner| %>

Short explanation:

"ERB will evaluate this":

<%  %>

"ERB will evaluate and output this":

<%=  %>