/
ch4tut14.lyx
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ch4tut14.lyx
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#LyX 2.0 created this file. For more info see http://www.lyx.org/
\lyxformat 413
\begin_document
\begin_header
\textclass hobo
\use_default_options true
\begin_modules
logicalmkup
\end_modules
\maintain_unincluded_children false
\language english
\language_package default
\inputencoding auto
\fontencoding global
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\graphics default
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\bibtex_command default
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\float_placement H
\paperfontsize default
\spacing single
\use_hyperref true
\pdf_bookmarks true
\pdf_bookmarksnumbered false
\pdf_bookmarksopen false
\pdf_bookmarksopenlevel 1
\pdf_breaklinks false
\pdf_pdfborder false
\pdf_colorlinks true
\pdf_backref false
\pdf_pdfusetitle true
\papersize default
\use_geometry false
\use_amsmath 0
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\cite_engine basic
\use_bibtopic false
\use_indices false
\paperorientation portrait
\suppress_date true
\use_refstyle 0
\boxbgcolor #e0e0e8
\index Index
\shortcut idx
\color #008000
\end_index
\secnumdepth -1
\tocdepth 2
\paragraph_separation skip
\defskip medskip
\quotes_language english
\papercolumns 1
\papersides 2
\paperpagestyle default
\tracking_changes false
\output_changes false
\html_math_output 0
\html_css_as_file 0
\html_be_strict false
\end_header
\begin_body
\begin_layout Section
Tutorial 14
\begin_inset Newline newline
\end_inset
Working with the Show Page Tag
\end_layout
\begin_layout Standard
In this tutorial you will learn the options for displaying details about
single records.
In the last two tutorials, we focused on displaying lists of records.
Hobo has a specific auto-generated tag for handling the display of individual
records and a route and view template associated with it.
\end_layout
\begin_layout Subsubsection
Tutorial Application:
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
four_table
\end_layout
\end_inset
\end_layout
\begin_layout Subsubsection
Topics
\end_layout
\begin_layout Itemize
Edit the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<show-page>
\begin_inset Index idx
status collapsed
\begin_layout Plain Layout
Tags!<show-page>
\end_layout
\end_inset
\end_layout
\end_inset
tag.
\end_layout
\begin_layout Itemize
Create and work with the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
show.dryml
\begin_inset Index idx
status collapsed
\begin_layout Plain Layout
auto-generated tags!show.dryml
\end_layout
\end_inset
\end_layout
\end_inset
template.
\end_layout
\begin_layout Itemize
Work with
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<field-list>
\begin_inset Index idx
status collapsed
\begin_layout Plain Layout
Tags!<field-list>
\end_layout
\end_inset
\end_layout
\end_inset
,
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<fieldname-label>
\begin_inset Index idx
status collapsed
\begin_layout Plain Layout
Tags!<fieldname-label>
\end_layout
\end_inset
\end_layout
\end_inset
and
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<view>
\end_layout
\end_inset
tags.
\end_layout
\begin_layout Subsubsection
Steps
\end_layout
\begin_layout Standard
Step 1
\end_layout
\begin_layout Standard
\begin_inset Flex Strong
status collapsed
\begin_layout Plain Layout
Copy the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<show-page>
\end_layout
\end_inset
tag
\end_layout
\end_inset
.
Go to
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
pages.dryml
\end_layout
\end_inset
and copy the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<show-page>
\end_layout
\end_inset
tag for Recipes to
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
application.dryml
\end_layout
\end_inset
.
\end_layout
\begin_layout Standard
\begin_inset Box Shadowbox
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "100col%"
special "none"
height "1in"
height_special "totalheight"
status open
\begin_layout Code
<def tag="show-page" for="Recipe">
\end_layout
\begin_layout Code
<page merge title="#{ht 'recipe.show.title',
\end_layout
\begin_layout Code
:default=>['Recipe'] }">
\end_layout
\begin_layout Code
<body: class="show-page recipe" param/>
\end_layout
\begin_layout Code
<content: param>
\end_layout
\begin_layout Code
<header param="content-header">
\end_layout
\begin_layout Code
<a:country param="parent-link">« <ht
\end_layout
\begin_layout Code
key="recipe.actions.back_to_parent"
\end_layout
\begin_layout Code
parent="Country"
\end_layout
\begin_layout Code
name="&this">Back to
\end_layout
\begin_layout Code
<name/></ht></a:country>
\end_layout
\begin_layout Code
<h2 param="heading">
\end_layout
\begin_layout Code
<ht key="recipe.show.heading"
\end_layout
\begin_layout Code
name="&this.respond_to?(:name)
\end_layout
\begin_layout Code
? this.name : ''">
\end_layout
\begin_layout Code
<name/>
\end_layout
\begin_layout Code
</ht>
\end_layout
\begin_layout Code
</h2>
\end_layout
\begin_layout Code
<record-flags fields="" param/>
\end_layout
\begin_layout Code
<a action="edit" if="&can_edit?"
\end_layout
\begin_layout Code
param="edit-link">
\end_layout
\begin_layout Code
<ht key="recipe.actions.edit"
\end_layout
\begin_layout Code
name="&this.respond_to?(:name)
\end_layout
\begin_layout Code
? this.name : ''">
\end_layout
\begin_layout Code
Edit Recipe
\end_layout
\begin_layout Code
</ht>
\end_layout
\begin_layout Code
</a>
\end_layout
\begin_layout Code
</header>
\end_layout
\begin_layout Code
<section param="content-body">
\end_layout
\begin_layout Code
\family typewriter
\color red
\begin_inset Flex Emph
status collapsed
\begin_layout Plain Layout
\color red
<view:body param="description"/>
\end_layout
\end_inset
\end_layout
\begin_layout Code
\family typewriter
\color red
\begin_inset Flex Emph
status collapsed
\begin_layout Plain Layout
\color red
<field-list fields="country" param/>
\end_layout
\end_inset
\end_layout
\begin_layout Code
<section param="collection-section">
\end_layout
\begin_layout Code
<h3 param="collection-heading">
\end_layout
\begin_layout Code
<ht key="category.collection.heading"
\end_layout
\begin_layout Code
count="&this.categories.count" >
\end_layout
\begin_layout Code
<human-collection-name
\end_layout
\begin_layout Code
collection="categories" your/>
\end_layout
\begin_layout Code
</ht>
\end_layout
\begin_layout Code
</h3>
\end_layout
\begin_layout Code
<collection:categories param/>
\end_layout
\begin_layout Code
</section>
\end_layout
\begin_layout Code
</section>
\end_layout
\begin_layout Code
</content:>
\end_layout
\begin_layout Code
</page>
\end_layout
\begin_layout Code
</def>
\end_layout
\end_inset
\end_layout
\begin_layout Standard
We are going to focus on three display components of this tag, The components
are noted in bold italics above, to help you understand how to change the
display of individual records.
(Add the ‘
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<field-list fields="country" param/>
\end_layout
\end_inset
’ if it is not present.)
\end_layout
\begin_layout Standard
Click on the
\begin_inset Quotes eld
\end_inset
Recipes
\begin_inset Quotes erd
\end_inset
tab and then click on an individual recipe.
\end_layout
\begin_layout Standard
\begin_inset Float figure
wide false
sideways false
status open
\begin_layout Plain Layout
\begin_inset Graphics
filename figures/figure155.png
width 90col%
\end_inset
\end_layout
\begin_layout Plain Layout
\begin_inset Caption
\begin_layout Plain Layout
The Recipe show page before modification
\end_layout
\end_inset
\end_layout
\begin_layout Plain Layout
\end_layout
\end_inset
\end_layout
\begin_layout Standard
Comment out the three lines above in bold italics using
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<!-- ...
-->
\end_layout
\end_inset
, and confirm that you have removed the display of the individual recipe
record.
\end_layout
\begin_layout Standard
Step 2.
\begin_inset Flex Strong
status collapsed
\begin_layout Plain Layout
Create the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
show.dryml
\end_layout
\end_inset
template
\end_layout
\end_inset
.
Go to
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
views/recipes
\end_layout
\end_inset
and create a new template file called
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
show.dryml
\end_layout
\end_inset
.
When a user invokes the
\begin_inset Quotes eld
\end_inset
show
\begin_inset Quotes erd
\end_inset
action by requesting the display of a single record, this is the first
of the three places Hobo looks to determine how to display the record.
\end_layout
\begin_layout Standard
As with the index action, its next two stops are the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
application.dryml
\end_layout
\end_inset
file to look for application wide tag definitions and ,finally, in
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
pages.dryml
\end_layout
\end_inset
for the auto-generated tag definitions which are based on model and controller
code.
\end_layout
\begin_layout Standard
Place the following code in
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
show.dryml
\end_layout
\end_inset
to invoke your show page.
\end_layout
\begin_layout Standard
\begin_inset Box Shadowbox
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "100col%"
special "none"
height "1in"
height_special "totalheight"
status open
\begin_layout LyX-Code
<show-page/>
\end_layout
\end_inset
\end_layout
\begin_layout Standard
Refresh your browser and you should see the following:
\end_layout
\begin_layout Standard
\begin_inset Float figure
wide false
sideways false
status open
\begin_layout Plain Layout
\begin_inset Graphics
filename figures/figure156.png
width 90col%
\end_inset
\end_layout
\begin_layout Plain Layout
\begin_inset Caption
\begin_layout Plain Layout
Recipe show page after removing three critical lines of code
\end_layout
\end_inset
\end_layout
\begin_layout Plain Layout
\end_layout
\end_inset
\end_layout
\begin_layout Standard
Step 3.
\begin_inset Flex Strong
status collapsed
\begin_layout Plain Layout
Use the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<field-list>
\end_layout
\end_inset
tag
\end_layout
\end_inset
.
The
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<field-list>
\end_layout
\end_inset
tag allows you to display rows of data in two columns.
The first column contains the name of the field and the second column contains
the contents of that field.
The
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<field-list>
\end_layout
\end_inset
tag has been parameterized in the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<show-page>
\end_layout
\end_inset
tag, so we need to invoke it with a trailing colon (:).
\end_layout
\begin_layout Standard
Remove the comments around the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<field-list>
\end_layout
\end_inset
tag in
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
application.dryml
\end_layout
\end_inset
and try the following in
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
show.dryml
\end_layout
\end_inset
.
\end_layout
\begin_layout Standard
\begin_inset Box Shadowbox
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "100col%"
special "none"
height "1in"
height_special "totalheight"
status open
\begin_layout Code
<show-page>
\end_layout
\begin_layout Code
<field-list: fields = "body, country"/>
\end_layout
\begin_layout Code
</show-page>
\end_layout
\end_inset
\end_layout
\begin_layout Standard
Here you are using the attribute
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
fields
\begin_inset Index idx
status collapsed
\begin_layout Plain Layout
Tags!<field-list> fields attribute
\end_layout
\end_inset
\end_layout
\end_inset
to declare which fields in your model you wish to display.
\end_layout
\begin_layout Standard
\begin_inset Float figure
wide false
sideways false
status open
\begin_layout Plain Layout
\begin_inset Graphics
filename figures/figure157.png
width 90col%
\end_inset
\end_layout
\begin_layout Plain Layout
\begin_inset Caption
\begin_layout Plain Layout
Using the <field=list> tag to choose which fields to display
\end_layout
\end_inset
\end_layout
\begin_layout Plain Layout
\end_layout
\end_inset
\end_layout
\begin_layout Standard
Hobo can even reach into the associated table and display the categories
using
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<field-list>
\begin_inset Index idx
status collapsed
\begin_layout Plain Layout
Tags!<field-list>
\end_layout
\end_inset
\end_layout
\end_inset
.
Try this.
\end_layout
\begin_layout Standard
\begin_inset Box Shadowbox
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "100col%"
special "none"
height "1in"
height_special "totalheight"
status open
\begin_layout Code
<show-page>
\end_layout
\begin_layout Code
<field-list: fields = "body, country,
\color red
categories
\color inherit
"/>
\end_layout
\begin_layout Code
</show-page>
\end_layout
\end_inset
\end_layout
\begin_layout Standard
You can remove the collection heading since you no longer need it by observing
that the
\begin_inset Flex Code
status collapsed