Say we have an Item Product(which has versions in en, jp, zh and 0 versions in ru). How can I get this item in en, jp and zh and not in ru.

I tried the below code.

Item tempItem = Sitecore.Context.Database.GetItem(tempID);
foreach (var itemLanguage in tempItem.Languages)
{
  //Do Something
}

Here tempItem.Languages is returning all four languages where I was expecting only three as ru does not have versions.

Is it the correct way to achieve this?

回答1:

You need to check the versioncount of the returned items. There are probably better ways to achieve this, but following your own code example, it would look something like this:

Item tempItem = Sitecore.Context.Database.GetItem(tempID);
foreach (var itemLanguage in tempItem.Languages)
{
    var item = tempItem.Database.GetItem(tempItem.ID, itemLanguage);
    if (item.Versions.Count > 0)
    {
        // do something. If there is no "ru" version, this will be 0
    }
}

回答2:

I ran an experiment to get a list of languages with the number of versions for items with varying numbers of children to check how expensive this is on the system.

The script below returns a list with the names of languages which have versions for the item.

public static List<string> LanguagesWithContent(this Item item)
{
    var result = ItemManager.GetContentLanguages(item).Select(lang => new {
        lang.Name,
        Versions = ItemManager.GetVersions(item, lang).Count
        //this is better than db.GetItem(item.ID, lang).Versions.Count      
    }).Where(t => t.Versions > 0).Select(t => t.Name).ToList();
    return result;
}

Benchmarking performance

First Load using GetVersions - when data is not from cache

0.7298ms to get Version Counts with 8 language versions. Time to load item: 9.3041ms. Langs: es-ES, es-MX, sv-SE, en, it-IT, pt-BR, fr-FR, de-DE
0.0448ms to get Version Counts with 7 language versions. Time to load item: 2.0039ms. Langs: es-ES, es-MX, en, it-IT, fr-FR, de-DE, ro-RO
0.0334ms to get Version Counts with 6 language versions. Time to load item: 3.145ms. Langs: es-ES, es-MX, en, it-IT, fr-FR, de-DE
0.0307ms to get Version Counts with 5 language versions. Time to load item: 1.5976ms. Langs: es-MX, en, it-IT, fr-FR, de-DE
0.0353ms to get Version Counts with 4 language versions. Time to load item: 10.2764ms. Langs: en, de-DE, ja-JP, da
0.0258ms to get Version Counts with 3 language versions. Time to load item: 1.9507ms. Langs: en, de-DE, ja-JP
0.0193ms to get Version Counts with 2 language versions. Time to load item: 2.0533ms. Langs: en, de-DE
0.0201ms to get Version Counts with 1 language versions. Time to load item: 4.7689ms. Langs: en

Repeat 1st Load experiment, using GetItem instead of GetVersions

conclusion: it's better to use ItemManager.GetVersions(item, lang).Count than db.GetItem(item.ID, lang).Versions.Count to get the list of language versions an item contains.

3.4936ms to get Version Counts with 8 language versions. Time to load item: 8.9118ms. Langs: es-ES, es-MX, sv-SE, en, it-IT, pt-BR, fr-FR, de-DE
0.9966ms to get Version Counts with 7 language versions. Time to load item: 1.6489ms. Langs: es-ES, es-MX, en, it-IT, fr-FR, de-DE, ro-RO
1.0875ms to get Version Counts with 6 language versions. Time to load item: 3.1538ms. Langs: es-ES, es-MX, en, it-IT, fr-FR, de-DE
0.5891ms to get Version Counts with 5 language versions. Time to load item: 1.4402ms. Langs: es-MX, en, it-IT, fr-FR, de-DE
2.2096ms to get Version Counts with 4 language versions. Time to load item: 9.8701ms. Langs: en, de-DE, ja-JP, da
0.9255ms to get Version Counts with 3 language versions. Time to load item: 2.5175ms. Langs: en, de-DE, ja-JP
0.7606ms to get Version Counts with 2 language versions. Time to load item: 2.2407ms. Langs: en, de-DE
1.9032ms to get Version Counts with 1 language versions. Time to load item: 5.0206ms. Langs: en

Subsequent loads - item is cached already

using ItemManager.GetVersions(item, lang) in this case. GetItem should in theory give similar results since subsequent loads leverage cache.
0.569ms to get Version Counts with 8 language versions. Time to load item: 0.0372ms. Langs: es -ES, es-MX, sv-SE, en, it-IT, pt-BR, fr-FR, de-DE
0.0429ms to get Version Counts with 7 language versions. Time to load item: 0.0475ms. Langs: es-ES, es-MX, en, it-IT, fr-FR, de-DE, ro-RO
0.025ms to get Version Counts with 6 language versions. Time to load item: 0.0247ms. Langs: es-ES, es-MX, en, it-IT, fr-FR, de-DE
0.0239ms to get Version Counts with 5 language versions. Time to load item: 0.0201ms. Langs: es-MX, en, it-IT, fr-FR, de-DE
0.0342ms to get Version Counts with 4 language versions. Time to load item: 0.0216ms. Langs: en, de-DE, ja-JP, da
0.0258ms to get Version Counts with 3 language versions. Time to load item: 0.0197ms. Langs: en, de-DE, ja-JP
0.0228ms to get Version Counts with 2 language versions. Time to load item: 0.019ms. Langs: en, de-DE
0.0228ms to get Version Counts with 1 language versions. Time to load item: 0.0178ms. Langs: en