set default value of property using events

Paul Griffiths 370 posts 1021 karma points

Jul 30, 2016 @ 14:49

Extending Umbraco and using the API

Umbraco 7

Hi everyone,

I really need some help setting a default value for a label property on my document types. After searching it has lead me to using events but im not having much luck.

I have two document types in umbraco called homeFixture & awayFixture and i would like to set the default value of a label (that will never change) when a new page is created. I have the following code which sets the value when i choose to create a new page

public class DocTypeCreateEventHandler : ApplicationEventHandler
    {
        protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
        {
            ContentService.Created += ContentService_Created;
        }

        void ContentService_Created(IContentService sender, Umbraco.Core.Events.NewEventArgs<Umbraco.Core.Models.IContent> e)
        {
            if (e.Entity.ContentType.Alias.ToString() == "homeFixture")
            {
                e.Entity.SetValue("location", "Home");
                e.Entity.SetValue("homeTeam", "Liverpool FC");
            }
            if (e.Entity.ContentType.Alias.ToString() == "awayFixture")
            {
                e.Entity.SetValue("location", "Away");
                e.Entity.SetValue("awayTeam", "Liverpool FC");
            }

        }
    }

However, when i select save and publish the default values that i am seeing when i create the page are disappearing. Does anyone know how i can persist these values once saved and published?

 public class DocTypeCreateEventHandler : ApplicationEventHandler
    {
        protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
        {
            ContentService.Published += ContentService_Created;
        }

        void ContentService_Created(IPublishingStrategy sender, Umbraco.Core.Events.PublishEventArgs<Umbraco.Core.Models.IContent> e)
        {
            foreach (var node in e.PublishedEntities)
            {
                if (node.ContentType.Alias.ToString() == "homeFixture")
                {
                    node.SetValue("location", "Home");
                    node.SetValue("homeTeam", "Liverpool FC");
                }
                if (node.ContentType.Alias.ToString() == "awayFixture")
                {
                    node.SetValue("location", "Away");
                    node.SetValue("awayTeam", "Liverpool FC");
                }
            }          

        }
    }

I have tried using this code to but having the same issue. It will update whn i select publish but when i revisit the node it disappears.

Been on this for ages - I am using umbraco v7.4

Thanks

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Paul Griffiths 370 posts 1021 karma points

Jul 30, 2016 @ 15:47

Not sure if its correct but using the Content.Saving did the trick.

public class DocTypeCreateEventHandler : ApplicationEventHandler
    {
        protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
        {
            ContentService.Saving += ContentService_Saving; 
        }

        void ContentService_Saving(IContentService sender, SaveEventArgs<IContent> e)
        {
            foreach (var node in e.SavedEntities)
            {
                if (node.ContentType.Alias.ToString() == "homeFixture")
                {
                    node.SetValue("location", "Home");
                    node.SetValue("homeTeam", "Cefn Albion FC");

                }
                if (node.ContentType.Alias.ToString() == "awayFixture")
                {
                    node.SetValue("location", "Away");
                    node.SetValue("awayTeam", "Cefn Albion FC");
                }
            }

        }
    }

Please let me know if there is a better way

Paul

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Ian 178 posts 752 karma points

Jul 30, 2016 @ 18:58

I'm not suggesting you change anything if its working, just seeing if you are aware of a new feature i came across recently. Its so new i havent used is but it looked potentially interesting for this sort of thing.

EditorModelEventManager.SendingContentModel

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Paul Griffiths 370 posts 1021 karma points

Jul 31, 2016 @ 13:15

Hi Ian,

Thanks for the tip! maybe something i can take a look into. I have it working but i still have an issue that you may be able to advise on?

so i have the following code that checks whether the teamType (DDL value) is set as either first or reserve and apends the label value accordingly.

public class DocTypeCreateEventHandler : ApplicationEventHandler
    {
        protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
        {
            ContentService.Saving += ContentService_Saving; 
        }

        void ContentService_Saving(IContentService sender, SaveEventArgs<IContent> e)
        {
            foreach (var node in e.SavedEntities)
            {
                //get the team page to a list
                var teamPage = node.Ancestors().Where(x => x.ContentType.Alias == "teamPage").ToList();

                if (node.ContentType.Alias == "homeFixture")
                {
                    foreach (var page in teamPage)
                    {
                        var teamType = umbraco.library.GetPreValueAsString(int.Parse(page.GetValue("teamType").ToString()));

                        if (teamType == "first")
                        {
                            node.SetValue("location", "Home");
                            node.SetValue("homeTeam", "Cefn Albion");
                        }
                        else
                        {
                            node.SetValue("location", "Home");
                            node.SetValue("homeTeam", "Cefn Albion Reserves");
                        }
                    }

                }
                if (node.ContentType.Alias == "awayFixture")
                {
                    foreach (var page in teamPage)
                    {
                        var teamType = umbraco.library.GetPreValueAsString(int.Parse(page.GetValue("teamType").ToString()));

                        if (teamType == "first")
                        {
                            node.SetValue("location", "Away");
                            node.SetValue("awayTeam", "Cefn Albion");
                        }
                        else
                        {
                            node.SetValue("location", "Away");
                            node.SetValue("awayTeam", "Cefn Albion Reserves");
                        }
                    }
                }

            }

        }
    }

However, the following line of code returns 0 on the first save and publish and the values are not updated.

var teamPage = node.Ancestors().Where(x => x.ContentType.Alias == "teamPage").ToList();

once it has published and then i save and publish again the labels update as per the logic in my code. I suspect it has something to do with the face that the page doesnt exist yet?

Any advice?

Thanks Paul

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Ian 178 posts 752 karma points

Jul 31, 2016 @ 18:29

Im not sure but that might be your problem exactly. You could see if there is anything else in the function arguments. I dont know if there would be a parentid property you could rely on i know at one point early on that is just -1 which wouldnt be any good. Path would also give you a parent to then use ancestor on if its populated yet. And then theres maybe looking at the request grabbing the id from the url when it looks like ...?create=true. If you look at the behaviour i think the id gets populated with the tree node clicked when creating which gives you some context.

Someone else may know better.

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Set default value of property using events