indexes.md

Index configuration

Custom Property Paths

Custom property paths can be used for data retrieval from the underlying model.

fos_elastica:
    indexes:
        user:
            properties:
                username:
                    property_path: indexableUsername
                firstName:
                    property_path: names[first]

This feature uses the Symfony PropertyAccessor component and supports all features that the component supports.

The above example would retrieve an indexed field username from the property User->indexableUsername, and the indexed field firstName would be populated from a key first from an array on User->names.

Setting the property path to false will disable transformation of that value. In this case the mapping will be created but no value will be populated while indexing. You can populate this value by listening to the FOS\ElasticaBundle\Event\PostTransformEvent event emitted by this bundle. See cookbook/custom-properties.md for more information about this event.

Handling missing results with FOSElasticaBundle

By default, FOSElasticaBundle will throw an exception if the results returned from Elasticsearch are different from the results it finds from the chosen persistence provider. This may pose problems for a large index where updates do not occur instantly or another process has removed the results from your persistence provider without updating Elasticsearch.

The error you're likely to see is something like: 'Cannot find corresponding Doctrine objects for all Elastica results.'

To solve this issue, each index can be configured to ignore the missing results:

fos_elastica:
    indexes:
        user:
            persistence:
                elastica_to_model_transformer:
                    ignore_missing: true

Dynamic templates

Dynamic templates allow to define mapping templates that will be applied when dynamic introduction of fields / objects happens.

Documentation

fos_elastica:
    indexes:
        user:
            dynamic_templates:
                my_template_1:
                    match: apples_*
                    mapping:
                        type: float
                my_template_2:
                    match: *
                    match_mapping_type: text
                    mapping:
                        type: keyword
            properties:
                username: { type: text }

Nested objects in FOSElasticaBundle

Note that object can autodetect properties

fos_elastica:
    indexes:
        post:
            properties:
                date: { boost: 5 }
                title: { boost: 3 }
                content: ~
                comments:
                    type: "nested"
                    properties:
                        date: { boost: 5 }
                        content: ~
                user:
                    type: "object"
                approver:
                    type: "object"
                    properties:
                        date: { boost: 5 }

Date format example

If you want to specify a date format:

fos_elastica:
    indexes:
        user:
            properties:
                username: { type: text }
                lastlogin: { type: date, format: basic_date_time }
                birthday: { type: date, format: "yyyy-MM-dd" }

Disable dynamic mapping example

If you want to specify manually the dynamic capabilities of Elasticsearch mapping, you can use the dynamic option:

fos_elastica:
    indexes:
        user:
            dynamic: strict
            properties:
                username: { type: text }
                addresses: { type: object, dynamic: true }

With this example, Elasticsearch is going to throw exceptions if you try to index a not mapped field, except in addresses.

Custom settings

Any setting can be specified when declaring an index. For example, to enable a custom analyzer, you could write:

fos_elastica:
    indexes:
        blog:
            settings:
                index:
                    analysis:
                        analyzer:
                            my_analyzer:
                                type: custom
                                tokenizer: lowercase
                                filter   : [my_ngram]
                        filter:
                            my_ngram:
                                type: "nGram"
                                min_gram: 3
                                max_gram: 5
            properties:
                title: { boost: 8, analyzer: my_analyzer }

Testing if an object should be indexed

FOSElasticaBundle can be configured to automatically index changes made for different kinds of objects if your persistence backend supports these methods, but in some cases you might want to run an external service or call a property on the object to see if it should be indexed.

A property, indexable_callback is provided under the index configuration that lets you configure this behaviour which will apply for any automated watching for changes and for a repopulation of an index.

In the example below, we're checking the enabled property on the user to only index enabled users.

fos_elastica:
    indexes:
        user:
            indexable_callback: 'enabled'

The callback option supports multiple approaches:

• A method on the object itself provided as a string. enabled will call Object->enabled(). Note that this does not support chaining methods with dot notation like property paths. To achieve something similar use the ExpressionLanguage option below.
• An array of a service id and a method which will be called with the object as the first and only argument. [ @my_custom_service, 'userIndexable' ] will call the userIndexable method on a service defined as my_custom_service.
• An array of a class and a static method to call on that class which will be called with the object as the only argument. [ 'Acme\DemoBundle\IndexableChecker', 'isIndexable' ] will call Acme\DemoBundle\IndexableChecker::isIndexable($object)
• A single element array with a service id can be used if the service has an __invoke method. Such an invoke method must accept a single parameter for the object to be indexed. [ @my_custom_invokable_service ]
• If you have the ExpressionLanguage component installed, A valid ExpressionLanguage expression provided as a string. The object being indexed will be supplied as object in the expression. object.isEnabled() or object.shouldBeIndexedAnyway(). For more information on the ExpressionLanguage component and its capabilities see its documentation

In all cases, the callback should return a true or false, with true indicating it will be indexed, and a false indicating the object should not be indexed, or should be removed from the index if we are running an update.

Provider Configuration

Specifying a custom query builder for populating indexes

When populating an index, it may be required to use a different query builder method to define which entities should be queried.

fos_elastica:
    indexes:
        user:
            persistence:
                provider:
                    query_builder_method: createIsActiveQueryBuilder

Populating batch size

By default, ElasticaBundle will index documents by packets of 100. You can change this value in the provider configuration.

fos_elastica:
    indexes:
        user:
            persistence:
                provider:
                    batch_size: 10

Changing the document identifier

By default, ElasticaBundle will use the id field of your entities as the Elasticsearch document identifier. You can change this value in the persistence configuration.

fos_elastica:
    indexes:
        user:
            persistence:
                identifier: searchId

Turning on the persistence backend logger in production

FOSElasticaBundle will turn off your persistence backend's logging configuration by default when Symfony2 is not in debug mode. You can force FOSElasticaBundle to always disable logging by setting debug_logging to false, to leave logging alone by setting it to true, or leave it set to its default value which will mirror %kernel.debug%.

fos_elastica:
    indexes:
        user:
            persistence:
                provider:
                    debug_logging: false

Listener Configuration

Realtime, selective index update

If you use the Doctrine integration, you can let ElasticaBundle update the indexes automatically when an object is added, updated or removed. It uses Doctrine lifecycle events. Declare that you want to update the index in real time:

fos_elastica:
    indexes:
        user:
            persistence:
                driver: orm #the driver can be orm, mongodb or phpcr
                model: Application\UserBundle\Entity\User
                listener: ~ # by default, listens to "insert", "update" and "delete"

Now the index is automatically updated each time the state of the bound Doctrine repository changes. No need to repopulate the whole "user" index when a new User is created.

You can also choose to only listen for some of the events:

fos_elastica:
    indexes:
        user:
            persistence:
                listener:
                    insert: true
                    update: false
                    delete: true

Asynchronous index update

You can also tell ElasticaBundle to update the indexes after Symfony response has returned. This is useful when you want your responses to return quickly and not be slowed down by round trips to your Elasticsearch instance. All updates to Elasticsearch will be batched up and only fire after the kernel.terminate and console.terminate events.

fos_elastica:
    indexes:
        user:
            persistence:
                listener:
                    defer: true

Logging Errors

By default FOSElasticaBundle will not catch errors thrown by Elastica/Elasticsearch. Configure a logger per listener if you would rather catch and log these.

fos_elastica:
    indexes:
        user:
            persistence:
                listener:
                    logger: true

Specifying true will use the default Elastica logger. Alternatively define your own logger service id.