Stack Overflow
Stack Overflow

Questions tagged [dynamic-attributes]

32 questions
210
votes
5 answers

Rails find_or_create_by more than one attribute?

There is a handy dynamic attribute in active-record called find_or_create_by: Model.find_or_create_by_(: => "") But what if I need to find_or_create by more than one attribute? Say I have a model to handle a M:M relationship…
tybro0103
  • 48,327
  • 33
  • 144
  • 170
18
votes
1 answer

getattr() versus __dict__ lookup, which is faster?

I can dynamically look up object attribute values using object.__dict__[some_key] or getattr(object, some_key). Which is faster or better, and why? >>> class SomeObject: ... pass ... >>> so = SomeObject() >>> so.name = 'an_object' >>>…
Cole
  • 2,489
  • 1
  • 29
  • 48
15
votes
4 answers

Dynamic attributes with Rails and Mongoid

I'm learning MongoDB through the Mongoid Ruby gem with Rails (Rails 3 beta 3), and I'm trying to come up with a way to create dynamic attributes on a model based on fields from another model, which I thought a schema-less database would be a good…
joeellis
  • 2,745
  • 7
  • 28
  • 45
10
votes
3 answers

How to set a dynamic attribute

Is there a way to set col as dynamic or convert it in some way to a valid attribute? It is currently throwing the error: undefined method `col=' for #... def copy_stock_data_from_sandbox(cntrlr) source_table =…
iamtoc
  • 1,569
  • 4
  • 17
  • 24
6
votes
2 answers

Using method missing in Rails

I have a model with several date attributes. I'd like to be able to set and get the values as strings. I over-rode one of the methods (bill_date) like so: def bill_date_human date = self.bill_date || Date.today date.strftime('%b %d, %Y') …
tybro0103
  • 48,327
  • 33
  • 144
  • 170
3
votes
2 answers

How Do I make dynamic-attributes Work in JSP Tag Files?

So according to my JSP reference book, as well as every other reference I can find on the web, I'm supposed to be able to do something like: <%@ tag dynamic-attributes="dynamicAttributesVar" %> and then when someone uses an attribute that I didn't…
machineghost
  • 33,529
  • 30
  • 159
  • 234
3
votes
1 answer

How to add conditional case sensitive attribute in Angular 2?

I want to add 'tourAnchor' attribute dynamically, for which I am adding below line.
But, the attribute is being replaced to case insensitive and upon condition check, it is being…
Rachitha B R
  • 81
  • 6
3
votes
4 answers

Remove image dynamically using jquery by clearing the src attribute

I know one can load image dynamically using $("#id").attr("src","path of the image"), but to onload the certain image on certain event, $("id").attr("src","") doesn't work. What's the correct way to unload the image runtime using jquery?? I cannot…
Hazel
  • 63
  • 2
  • 4
  • 10
2
votes
1 answer

Unable to add a dynamic attribute to a Spring form:input tag

I have a Spring form tag and am trying to add a dynamic attribute (the "placeholder" attribute), but get the following error org.apache.jasper.JasperException: /WEB-INF/jsp/work.jsp (line: 290, column: 3) Attribute placeholder invalid for tag…
arnthorsnaer
  • 53
  • 2
  • 7
2
votes
0 answers

JSP Custom Tag File and Dynamic attributes

I have a custom JSP tag tag file, which is a wrapper around HTML input controls - dropdown etc, like so - Here "table" is a declared attribute of the tag where as…
Anupama
  • 167
  • 1
  • 9
2
votes
2 answers

What is the purpose of dynamic fields in MongoDB?

At first, I thought it was pretty cool that you can add something to an object without it being defined in the model. But now I can't imagine how this is used in a web application like a Ruby on Rails application. What use cases require dynamic…
Jake Smith
  • 2,332
  • 1
  • 30
  • 68
1
vote
1 answer

Dynamically creating read-only attributes

I'm currently trying to create a class that inherits from set, but allows calling for subsets with attributes. Since I want to create this class such that I can use it in any context, I want to have it be able to create attributes from any given…
JohnMcSwag
  • 13
  • 3
1
vote
1 answer

Add attributes inside custom attribute in c#

I want to dynamically add attributes to properties of a given class, because the project will get bigger and the procedure is totally repeatinglly, something like so : public class MyAttr : Attribute { public MyAttr () { foreach(var prop…
Hooman Limouee
  • 1,143
  • 2
  • 21
  • 43
1
vote
0 answers

VBA to html, onclick event function with dynamic element attributes

I am trying to automate filling in a web form on intracompany web in excel using IE. My previous question was to target dynamic element ID which got resolved thank to SIM (thanks again!) Unfortunately I cannot use the same method to proceed; with…
Matus Kovac
  • 19
  • 2
1
vote
1 answer

Can't inflate view with dynamic attr drawable

I have ExpandableListView with custom adapter and in groupview of this list I use dynamic attrs for it's imagebutton src drawable, declared in such style: g_view.xml ... android:src="?attr/img_add" ... attrs.xml attr name="img_add"…
Movsar Bekaev
  • 888
  • 1
  • 12
  • 30
1
2 3