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Einar Kretzler

2008-Jul-23 20:30 UTC

How can determine if an item has a value or not?

When i execute the followin code i get the following message:
"comparison of Time with String failed"

<% @auftrag.attributes.each do |key, item| %>

  <%if item > "" %>
    <b>Key: <%= key %>:</b>
    Item: <%= item %>
  <%end%>

<%end%>

 One of the fields in my database is a datefield and seems not to work
with > ""
How can determine if an item is filled or not?

tia
-- 
Posted via http://www.ruby-forum.com/.

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Christopher Kintner

2008-Jul-23 20:39 UTC

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Re: How can determine if an item has a value or not?

On Wed, Jul 23, 2008 at 3:30 PM, Einar Kretzler
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:>
> When i execute the followin code i get the following message:
> "comparison of Time with String failed"
>
> <% @auftrag.attributes.each do |key, item| %>
>
>  <%if item > "" %>
>    <b>Key: <%= key %>:</b>
>    Item: <%= item %>
>  <%end%>
>
> <%end%>
>
>  One of the fields in my database is a datefield and seems not to work
> with > ""
> How can determine if an item is filled or not?
Use either item.nil? or item.blank?

> tia
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>
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Bill Walton

2008-Jul-23 20:54 UTC

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Re: How can determine if an item has a value or not?

Hi Einar,

Einar Kretzler wrote:
> How can determine if an item is filled or not?
<% unless item.nil? %>

HTH, 
Bill

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Einar Kretzler

2008-Jul-23 21:13 UTC

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Re: How can determine if an item has a value or not?

Bill Walton wrote:> Hi Einar,
> 
> Einar Kretzler wrote:
> 
>> How can determine if an item is filled or not?
> 
> <% unless item.nil? %>
> 
> HTH,
> BillThanks, but there are still the empty key -- items shown

<% @auftrag.attributes.each do |key, item| %>
<% unless item.nil? %>
    <b>Key: <%= key %></b>
    <%= item %>
<%end%>
<%end%>

produces something like:
Key: sonst_verm Key: gemeinschaft Key: whg_verm Key: updated_at Tue Jul 
22 16:23:44 +0200 2008 Key: hs_verm Key: format werwer Key: etw_vk Key: 
anzeigentext lkjl Key: fioport ljkkjhj Key: art jklhjlk Key: immo_sonst 
Key: gesuch_immo Key: dateien Key: zeitung_sonst Key: id 4 Key: zeitung 
newspapername Key: immo_vk Key: ang_gewerbe Key: sonder_hoehe Key: 
sonder_breite Key: ersch_datum 2008-07-21 Key: spalten 8 Key: created_at 
Mon Jul 21 21:04:40 +0200 2008

i want to get rid of the empty key --values pairs where there are no 
entries in the database
-- 
Posted via http://www.ruby-forum.com/.

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Kieran P

2008-Jul-23 21:31 UTC

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Re: How can determine if an item has a value or not?

Try

<% unless item.empty? %>


Regards
Kieran


On Thu, Jul 24, 2008 at 9:13 AM, Einar Kretzler <
rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:
>
> Bill Walton wrote:
> > Hi Einar,
> >
> > Einar Kretzler wrote:
> >
> >> How can determine if an item is filled or not?
> >
> > <% unless item.nil? %>
> >
> > HTH,
> > Bill
> Thanks, but there are still the empty key -- items shown
>
> <% @auftrag.attributes.each do |key, item| %>
> <% unless item.nil? %>
>    <b>Key: <%= key %></b>
>    <%= item %>
> <%end%>
> <%end%>
>
> produces something like:
> Key: sonst_verm Key: gemeinschaft Key: whg_verm Key: updated_at Tue Jul
> 22 16:23:44 +0200 2008 Key: hs_verm Key: format werwer Key: etw_vk Key:
> anzeigentext lkjl Key: fioport ljkkjhj Key: art jklhjlk Key: immo_sonst
> Key: gesuch_immo Key: dateien Key: zeitung_sonst Key: id 4 Key: zeitung
> newspapername Key: immo_vk Key: ang_gewerbe Key: sonder_hoehe Key:
> sonder_breite Key: ersch_datum 2008-07-21 Key: spalten 8 Key: created_at
> Mon Jul 21 21:04:40 +0200 2008
>
> i want to get rid of the empty key --values pairs where there are no
> entries in the database
>
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Bill Walton

2008-Jul-23 21:33 UTC

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Re: How can determine if an item has a value or not?

Einar Kretzler wrote:>
> Bill Walton wrote:
> > Hi Einar,
> >
> > Einar Kretzler wrote:
> >
> >> How can determine if an item is filled or not?
> >
> > <% unless item.nil? %>
> >
> > HTH,
> > Bill
>
> Thanks, but there are still the empty key -- items shown
>
> <% @auftrag.attributes.each do |key, item| %>
> <% unless item.nil? %>
>     <b>Key: <%= key %></b>
>     <%= item %>
> <%end%>
> <%end%>
>
> produces something like:
> Key: sonst_verm Key: gemeinschaft Key: whg_verm Key: updated_at Tue Jul
> 22 16:23:44 +0200 2008 Key: hs_verm Key: format werwer Key: etw_vk Key:
> anzeigentext lkjl Key: fioport ljkkjhj Key: art jklhjlk Key: immo_sonst
> Key: gesuch_immo Key: dateien Key: zeitung_sonst Key: id 4 Key: zeitung
> newspapername Key: immo_vk Key: ang_gewerbe Key: sonder_hoehe Key:
> sonder_breite Key: ersch_datum 2008-07-21 Key: spalten 8 Key: created_at
> Mon Jul 21 21:04:40 +0200 2008
>
> i want to get rid of the empty key --values pairs
> where there are no entries in the database
Sorry about that.  Changing item.nil? to item.blank? should take care of the
other items.  blank? returns true for both nil and an empty string.

Best regards,
Bill


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Rails - Jul 2008 - How can determine if an item has a value or not?

How can determine if an item has a value or not?

Re: How can determine if an item has a value or not?

Re: How can determine if an item has a value or not?

Re: How can determine if an item has a value or not?

Re: How can determine if an item has a value or not?

Re: How can determine if an item has a value or not?