Properties

The properties method is where you define the output that goes into the view you fetch from the Delivery API

Properties example

properties: function (sourceEntity, context) {
  return {
    title: sourceEntity.properties.title,
    seo: {
      title: sourceEntity.properties.seoTitle,
      description: sourceEntity.properties.seoDescription,
    }
    categoryIds: sourceEntity.properties.categoryIds
                                .map(categoryId => parseInt(categoryId))
  };
}

The properties method must return an object with the data you want to include in your view.

PropertiesContext object

The PropertiesContext object is passed into the properties method and gives you access to a set of methods described below.

Methods

Method	Description
lookup	Lookup allows you to search source entities using a filter string and work with the source entities directly in the schema.
partial	Referencing a partial schema. Mapped data from a partial schema is embedded into the calling schema.
reference	Referencing a full schema. References to other schemas are resolved on delivery request time.

lookup

Lookup source entities.

Lookup allows you to search source entities using a filter string and work with the data from the source entities directly in the schema.

Note the lookup is an async function so you have to use async/await when you are using the lookup function.

lookup(filter)

Parameters

Parameter	Type	Description
filter	string	A filtering criteria.

See list of filter examples here

Required function calls

After the lookup function it's required to call toPromise to excecute the query and return a promise.

toPromise

Using the toPromise function excecutes the query and return a promise you must resolve.

look toPromise

const newsArticles: await context
                .lookup("type eq 'newsArticle'")
                .toPromise()

Optional function calls

To filter the source entities even further you can call some of the following optional functions.

limit

The limit function limits the number of source entities.

Parameters

Parameter	Type	Description
limit	number	The maximum number of source entities to return.

look and limit

const newsArticles: await context
                .lookup("type eq 'newsArticle'")
                .limit(5)
                .toPromise()

orderBy

The order sequence of the source entities.

Parameters

Parameter	Type	Description
orderBy	{ propertyName: string, direction: "asc" | "desc" }	Allows you to specify your desired sorting order.

lookup and orderBy

const newsArticles: await context
                .lookup("type eq 'newsArticle'")
                .orderBy({ propertyName: "properties.createdDate", direction: "desc"})
                .toPromise()

sourceGroup

The sourceGroup function lets you specify the source group. By default the source group of the current source entity is used.

Parameters

Parameter	Type	Description
sourceGroup	string	Allows you to define a different source group. The sourceGroupAlias should be equal to the desired source group alias where you want to look for source entities.

If not defined, it uses the current source group.

lookup and sourceGroup

const newsArticles: await context
                .lookup("type eq 'newsArticle'")
                .sourceGroup("anotherSourceGroup")
                .toPromise()

Examples

lookup with async/await

properties: async function (sourceEntity, context) {
  const latestNews = await context
                          .lookup("type eq 'newsArticle'")
                          .orderBy({ propertyName: "properties.createdDate", direction: "desc"})
                          .limit(3)
                          .toPromise();

  const mappedNews = latestNews
                  .map((news) => ({
                      url: news.url,
                      title: news.properties.title,
                      teaser: news.properties.teaser
                  }));

  return {
    latestNews: mappedNews
  }
}

---

partial

Referencing a partial schema.

The partial mapping property type allows for dynamically including partial schemas into the main schema. This is useful when you need to iterate an array of different objects that has an identifier, like an ID, alias or similar.

tip

Partial schemas are typically used when you want a reusable schema for mapping data that is part of the same entity. E.g. if metadata (title, description, etc.) is the same across different entity types, but the data lives on the entity itself.

Read more about partial schemas here

partial(schemaAlias, input)

Parameters

Parameter	Type	Description
schemaAlias	string	The alias of a partial schema.
input	object	You can pass whatever data you need for your partial schema.

Examples

partial

contentBlocks: sourceEntity.properties.contentBlocks.map((contentBlock) =>
    context.partial(`block-${contentBlock.contentType}`, contentBlock)
  )

passing extra properties to the partial schema

contentBlocks: sourceEntity.properties.contentBlocks.map((contentBlock) =>
    context.partial(`block-${contentBlock.contentType}`, {
        block: contentBlock,
        pageOriginId: sourceEntity.originId
      })
  )

The input defines what goes into the partial schema and can be any custom object, and the schemaAlias is used to resolve what partial schema to use. So, in this case, we could have a partial schema with an alias: block-headline.

---

reference

The reference are used to reference other views created from either this source entity or another source entity.

When referenced, Enterspeed will resolve the view when requested by the Delivery API so that the data will stay up-to-date if a reference view is updated.

The reference function is the starting point where you can use our fluent API to configure the reference(s) you want (by filter, by originId, take only top 5, and so on).

tip

Reference schemas are typically used when you are mapping data from another entity. E.g. a page has a reference to another page entity or media entity.

Read more about reference schemas here

reference(schemaAlias)

Parameters

Parameter	Type	Description
schemaAlias	string	The alias of a schema.

Required function calls

After the reference function it's required to call one of the following functions to define what source entities you want references to.

byOriginId

Using the byOriginId function lets you create a reference to a source entity by its oringinId.

Parameters

Parameter	Type	Description
originId	string	The original id from the source system.

reference by byOriginId

contentTeaser: context
                .reference("contentTeaser")
                .byOriginId(sourceEntity.properties.link.id)

byOriginIds

Using the byOriginIds function lets you create a references to a list of source entity by their oringinId.

Parameters

Parameter	Type	Description
originIds	string[]	A list of original ids from the source system.

reference by byOriginIds

contentTeaser: context
                .reference("contentTeaser")
                .byOriginIds(sourceEntity.properties.links.map(link => link.id))

children

The children function creates a reference to all the children of the current source entity. It's basicly a shortcut for .filter("originParentId eq '{sourceEntity.properties.originId}'").

reference by children

childPages: context.reference("page").children()

reference by children and type

childPages: context.reference("page").children("type eq 'subpage'")

filter

Using the filter function lets you do a dynamic search for source entities you want to make references to.

Parameters

Parameter	Type	Description
filter	string	A filtering criteria.

See list of filter examples here

reference by filter

newsTeasers: context
              .reference("newsTeaser")
              .filter("type eq 'newsArticle'")

parent

The parent function creates a reference to the parent of the current source entity. It's basicly a shortcut for .filter("originId eq '{sourceEntity.properties.originParentId}'").

reference by parent

parentPage: context
              .reference("page")
              .parent()

self

The self method creates a reference to a view created by the specified schema on the current source entity. The helper method is equivalent to calling .byOriginId(sourceEntity.originId).

reference by self

selfPage: context
              .reference("page")
              .self()

Optional function calls

To filter the source entities you are making references to even further you can call some of the following optional functions.

limit

The limit function limits the number of references.

Parameters

Parameter	Type	Description
limit	number	The maximum number of references to return.

reference by filter and limit

topFiveNewsTeasers: context
                      .reference("newsTeaser")
                      .filter("type eq 'newsArticle'")
                      .limit(5)

orderBy

The order sequence of references.

Parameters

Parameter	Type	Description
orderBy	{ propertyName: string, direction: "asc" | "desc" }	Allows you to specify your desired sorting order.

reference by filter and orderBy

newsArticles: context
                .reference("newsArticle")
                .filter("type eq 'newsArticle'")
                .orderBy({ propertyName: "properties.createdDate", direction: "desc"})

sourceGroup

The sourceGroup function lets you specify the source group. By default the source group of the current source entity is used.

Parameters

Parameter	Type	Description
sourceGroup	string	Allows you to define a different source group. The sourceGroupAlias should be equal to the desired source group alias where you want to look for source entities.

If not defined, it uses the current source group.

reference by filter and sourceGroup

newsTeasers: context
              .reference("newsTeaser")
              .filter("type eq 'newsArticle'")
              .sourceGroup("anotherSourceGroup")

Examples

Property type: reference (static value) with originId

seoData: context.reference("seo").byOriginId(sourceEntity.originId)

reference by filter and sourceGroup

products: context
            .reference("product")
            .filter("type eq 'product'")
            .orderBy({ propertyName: name, direction: "asc"})
            .limit(10)
            .sourceGroup("commerce")

The schemaAlias can either be a static value, like "seo", or it can be a dynamic value being resolved from the Source Entity that is being processed by Enterspeed. This allows for supporting almost any use case.

Reference response

The response of references differs in V1 and V2+ of the delivery API. V1 return the id, type and wraps the properties from the referenced view in a view property. The response of references in V2+ is much cleaner and only returns the actual properties from the referenced schema. If a reference is not found in V2+, the reference information is added in the missingViewReference property in the meta object for debugging purpose.

Delivery API V1 uses a nested view property

{
  // This example shows a response of a view with two schema references.
  // image1 is referencing a found view with a url and name property
  // and image2 is referencing a view that doesn't exist.

  "meta": {
    "missingViewReferences": []
  },
  "route": {
    "image1": {
      "id": "gid://Environment/8ef2bdc0-c352-4190-a344-c51d1f5e72ea/Source/dc5d9518-b96a-428a-a9b3-31fb601376c2/Entity/1234/View/image",
      "view": {
        "url": "https://test.com/how-to-write-a-good-blog-post.png",
        "name": "How To Write A Good Blog Post"
      },
      "type": "ViewReference"
    },
    "image2": {
      "id": "gid://Environment/8ef2bdc0-c352-4190-a344-c51d1f5e72ea/Source/dc5d9518-b96a-428a-a9b3-31fb601376c2/Entity/1235/View/image",
      "view": null,
      "type": "ViewReference"
    }
  }
}

Delivery API V2+ only returns the actual view properties

{
  // This example shows a response of a view with two schema references.
  // image1 is referencing a found view with a url and name property
  // and image2 is referencing a view that doesn't exist.

  "meta": {
    "missingViewReferences": [
      {
        "path": "image2",
        "viewId": "gid://Environment/8ef2bdc0-c352-4190-a344-c51d1f5e72ea/Source/dc5d9518-b96a-428a-a9b3-31fb601376c2/Entity/1235/View/image"
      }
    ]
  },
  "route": {
    "image1": {
      "url": "https://test.com/how-to-write-a-good-blog-post.png",
      "name": "How To Write A Good Blog Post"
    },
    "image2": null
  }
}