topic Re: Does 2.1 Fix the random field ordering? in ArcGIS API for Flex Questions

Does 2.1 Fix the random field ordering?

TonyCollins — Thu, 23 Sep 2010 14:29:07 GMT

Hi there,

Does 2.1 Fix the random field ordering issue when performing an identify? I have just had a call closed which I need to reopen if this is not the case!

I have just tested it, and although it looks a different order to my production application it still does not list the fields in the same order as the dataset.

Can anyone give me some direction as this is something that is getting logged with me regularly as new users migrate to this system.

Re: Does 2.1 Fix the random field ordering?

SallyGracia — Thu, 23 Sep 2010 22:42:48 GMT

Hi there,

I reported the same issue this week in 2.0. Not sure if it is fixed in 2.1. It's weird that the data displays in a random order.

Re: Does 2.1 Fix the random field ordering?

DasaPaddock — Mon, 27 Sep 2010 16:47:46 GMT

The order of the fields shown in the Search and Query widgets is undetermined if you return all the fields using all="true" and you're not using ArcGIS Server 10.

Re: Does 2.1 Fix the random field ordering?

TonyCollins — Wed, 29 Sep 2010 13:14:48 GMT

The order of the fields shown in the Search and Query widgets is undetermined if you return all the fields using all="true" and you're not using ArcGIS Server 10.

Does this apply when using an IdentifyTask?

Re: Does 2.1 Fix the random field ordering?

DasaPaddock — Sat, 11 Dec 2021 14:42:48 GMT

No, you'd still need to either hard-code or use LayerDetails.fields to pull out the attributes in a particular order. The Search and Query Widgets are taking advantage of the fields returned as part of the FeatureSet from ArcGIS Server 10. Here's the code from QueryWidget:

                        if (featureSet.fields) // requires ArcGIS Server 10.0+
                        {
                            for each (var field:Field in featureSet.fields)
                            {
                                if (field.name in graphic.attributes)
                                {
                                    displayFields(field.name, getFieldXML(field.name), field);
                                }
                            }
                        }
                        else
                        {
                            for (var fieldName:String in graphic.attributes)
                            {
                                displayFields(fieldName, getFieldXML(fieldName), null);
                            }
                        }

The underlying problem is that when you use for..in statements to pull out all the values from an Object, ActionScript doesn't guarantee any order.

Reference:
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/statements.html#for..in

Re: Does 2.1 Fix the random field ordering?

TonyCollins — Sat, 11 Dec 2021 14:42:50 GMT

                        if (featureSet.fields) // requires ArcGIS Server 10.0+
                        {
                            for each (var field:Field in featureSet.fields)
                            {
                                if (field.name in graphic.attributes)
                                {
                                    displayFields(field.name, getFieldXML(field.name), field);
                                }
                            }
                        }
                        else
                        {
                            for (var fieldName:String in graphic.attributes)
                            {
                                displayFields(fieldName, getFieldXML(fieldName), null);
                            }
                        }

Hi Dasa, Thanks for your replies on this and sorry if this sounds like me just trying to get my head round it!

I understand what you say about looping through dynamic object properties, but when I look at a feature within an IdentiftResult the attributes are all in a seemingly random order before I do any for..in statements?

As the tool in question is an Identify it is used on any service layer and I will therefore not know what data to expect so hard-coding is not an option for me.

So in short (for my boss), IdentifyResult.Feature.Attributes are always going to be in a random order until we move to ArcGIS Server 10?

Thanks for you help, I just need to be able to say this issue will definitely be addressed when we upgrade and do a little recoding.

Side note: I'm not using the viewer or any widgets.

Re: Does 2.1 Fix the random field ordering?

DasaPaddock — Thu, 30 Sep 2010 18:25:19 GMT

I understand what you say about looping through dynamic object properties, but when I look at a feature within an IdentiftResult the attributes are all in a seemingly random order before I do any for..in statements?

What are you using to "look at a feature"?

So in short (for my boss), IdentifyResult.Feature.Attributes are always going to be in a random order until we move to ArcGIS Server 10?

This is not changed by AGS 10 since the attributes are still in an object. You can use LayerDetails to get the fields of the layer and loop through them in that order like the code above in the QueryWidget.
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/supportClasses/LayerDetails.html

Re: Does 2.1 Fix the random field ordering?

TonyCollins — Fri, 01 Oct 2010 16:46:36 GMT

What are you using to "look at a feature"?

This is not changed by AGS 10 since the attributes are still in an object. You can use LayerDetails to get the fields of the layer and loop through them in that order like the code above in the QueryWidget.
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/supportClasses/LayerDetails.html

Looking in a debug session ....

So LayerDetails in v10 is the answer?

Thanks again

Re: Does 2.1 Fix the random field ordering?

DasaPaddock — Fri, 01 Oct 2010 17:29:21 GMT

Yes, except ArcGIS Server 10 is not required to get LayerDetails (unless you're trying to get them all at once in the AllDetails class).