Ok, I'm taking a fairly simple xml file containing a series of events
and I want to convert it to csv - nothing new there.
However, some events have two or more dates listed and I'd like to
display each as individual lines. My ruby skills are fairly limited but
from googling around I can extract everything up to the dates, but I'm
banging my head against a wall to get any further...
Which gives me:
1234|Event Title|Event Category|Venue Name|1 Some Street|Some Town
But what I really want is:
1234|Event Title|Event Category|Venue Name|1 Some Street|Some
Town>2009-04-01 18:00:00
1234|Event Title|Event Category|Venue Name|1 Some Street|Some
Town>2009-04-03 18:00:00
I'm sure this should be fairly simple but any help would be appreciated.
Cheers!
Ok, I'm taking a fairly simple xml file containing a series of events
and I want to convert it to csv - nothing new there.
However, some events have two or more dates listed and I'd like to
display each as individual lines. My ruby skills are fairly limited but
from googling around I can extract everything up to the dates, but I'm
banging my head against a wall to get any further...
Here you need to iterate through all the "performance" elements _below the current event_ and concatenate the individual performance's date with what you have built so far.
You should probably also take measures to emit a line without a date in case zero performances can be found in input XML.
end
Which gives me:
1234|Event Title|Event Category|Venue Name|1 Some Street|Some Town
But what I really want is:
1234|Event Title|Event Category|Venue Name|1 Some Street|Some
Town>2009-04-01 18:00:00
1234|Event Title|Event Category|Venue Name|1 Some Street|Some
Town>2009-04-03 18:00:00
I'm sure this should be fairly simple but any help would be appreciated.
Cheers!
Kind regards
robert
···
On 17.03.2009 13:03, Sandy Thomson wrote:
--
remember.guy do |as, often| as.you_can - without end
What you are really interested in is each performance (each performance
generates one line of output). So simply deepen your loop:
xml.elements.each("//event") do |e|
e.elements.each("//performance") do |p|
Now do exactly what you're doing and just append the performance date.
So, for example:
require 'rexml/document'
include REXML
output = ""
class REXML::Element
def textof(xpaths_arr); xpaths_arr.map {|x| elements.text}; end
end
xml = Document.new(s)
xp = %w{title category venue/name
venue/address/address1 venue/address/town}
xml.elements.each("//event") do |e|
e.elements.each("//performance") do |p|
output <<
[e.attributes['id'],
e.textof(xp),
p.attributes['date']].flatten.join("|") + "\n"
end
end
m.
···
Sandy Thomson <rhubarbcrumble@gmail.com> wrote:
Ok, I'm taking a fairly simple xml file containing a series of events
and I want to convert it to csv - nothing new there.
However, some events have two or more dates listed and I'd like to
display each as individual lines. My ruby skills are fairly limited but
from googling around I can extract everything up to the dates, but I'm
banging my head against a wall to get any further...
Which gives me:
1234|Event Title|Event Category|Venue Name|1 Some Street|Some Town
But what I really want is:
1234|Event Title|Event Category|Venue Name|1 Some Street|Some
Town>2009-04-01 18:00:00
1234|Event Title|Event Category|Venue Name|1 Some Street|Some
Town>2009-04-03 18:00:00
Here you need to iterate through all the "performance" elements _below
the current event_ and concatenate the individual performance's date
with what you have built so far.
You should probably also take measures to emit a line without a date in
case zero performances can be found in input XML.
Kind regards
robert
Thank you Robert, I'm getting closer...
I modified it as below, but for some reason the dates are now stacking
up on each other as so:
1234|Event Title|Event Category|Venue Name|1 Some Street|Some
Town>2009-04-01 18:00:00
1234|Event Title|Event Category|Venue Name|1 Some Street|Some
Town>2009-04-01 18:00:00|2009-04-03 18:00:00
What you are really interested in is each performance (each performance
generates one line of output). So simply deepen your loop:
xml.elements.each("//event") do |e|
e.elements.each("//performance") do |p|
Now do exactly what you're doing and just append the performance date.
So, for example:
require 'rexml/document'
include REXML
output = ""
class REXML::Element
def textof(xpaths_arr); xpaths_arr.map {|x| elements.text}; end
end
xml = Document.new(s)
xp = %w{title category venue/name
venue/address/address1 venue/address/town}
xml.elements.each("//event") do |e|
e.elements.each("//performance") do |p|
output <<
[e.attributes['id'],
e.textof(xp),
p.attributes['date']].flatten.join("|") + "\n"
end
end
m.
Ok, so this is plainly much neater, thanks Matt
...but, whilst it works for one event with multiple dates, as soon as I
add a second event it iterates through all of the dates against every
event, so for 2 events each with 2 dates it outputs 8 lines...
Here's the code as it now stands:
require 'rexml/document'
include REXML
output = ""
class REXML::Element
def textof(xpaths_arr); xpaths_arr.map {|x| elements.text}; end
end
xml = REXML::Document.new(File.open("data.xml"))
csv_file = File.new("data.csv", "w")
xp = %w{title category venue/name venue/address/address1
venue/address/town}
xml.elements.each("//event") do |e|
e.elements.each("//performance") do |p|
..but, whilst it works for one event with multiple dates, as soon as I
add a second event it iterates through all of the dates against every
event, so for 2 events each with 2 dates it outputs 8 lines...
Cool!
xml.elements.each("//event") do |e|
e.elements.each("//performance") do |p|
Yeah, sorry about that. I wasn't thinking about the XPath here.
Obviously "//performance" is wrong. I shoulda said
"descendant::performance" or "performances/performance" or similar.
Of course one could also argue that Ruby and REXML are more heavyweight
than you need; you're just dumpster-diving in simple XML and outputting
text, so you could write this whole thing as an XSLT template. Choices,
choices...!
..but, whilst it works for one event with multiple dates, as soon as I
add a second event it iterates through all of the dates against every
event, so for 2 events each with 2 dates it outputs 8 lines...
Cool!
xml.elements.each("//event") do |e|
e.elements.each("//performance") do |p|
Yeah, sorry about that. I wasn't thinking about the XPath here.
Obviously "//performance" is wrong. I shoulda said
"descendant::performance" or "performances/performance" or similar.
Of course one could also argue that Ruby and REXML are more heavyweight
than you need; you're just dumpster-diving in simple XML and outputting
text, so you could write this whole thing as an XSLT template. Choices,
choices...!
m.
Choices indeed, but it works perfectly now so I'll go with it
