JsonCollectionSourceModelAdapter class

A database adapter that uses Json files as a data source.

Json files can be used as configuration files for settings and other purposes.

URL, asset path, or Json data can be directly specified in source.

requestHeaders specifies request headers to be sent when requesting as HTTP.

requestMethod specifies the request method to be sent when requesting as HTTP.

By passing data to initialValue, the database can be used as a data mockup because it contains data in advance.

If validator is specified, validation is performed in the database.

Jsonファイルをデータソースとして利用するデータベースアダプター。

Jsonファイルで設定などを行う場合、設定ファイルとして利用することができます。

sourceにはURLやアセットパス、Jsonデータを直接指定することができます。

requestHeadersにはHTTPとしてリクエストする際に送るリクエストヘッダーを指定します。

requestMethodにはHTTPとしてリクエストする際に送るリクエストメソッドを指定します。

initialValueにデータを渡すことで予めデータが入った状態でデータベースを利用することができるためデータモックとして利用することができます。

validatorを指定するとデータベース内でのバリデーションが行われます。

Treat Json in the form of a Map of Map or a List of Map as a collection.

MapのMap、もしくはMapのListの形式のJsonをコレクションとして扱います。

{
  "1": {
    "id": 1,
    "name": "John",
    "age": 20
  },
  "2": {
    "id": 2,
    "name": "Tom",
    "age": 30
  },
  "3": {
    "id": 3,
    "name": "Alice",
    "age": 40
  }
}

->

{
  "1": {
    "id": 1,
    "name": "John",
    "age": 20
  },
  "2": {
    "id": 2,
    "name": "Tom",
    "age": 30
  },
  "3": {
    "id": 3,
    "name": "Alice",
    "age": 40
  }
}

Inheritance

• Object
• ModelAdapter
• JsonSourceModelAdapter
• JsonCollectionSourceModelAdapter

Available Extensions

• FutureIndicatorExtensions

Annotations

• @immutable

Constructors

JsonCollectionSourceModelAdapter({List<ModelInitialValue>? initialValue, NoSqlDatabase? database, String? collectionPath, required String source, String? idKey, Map<String, String>? requestHeaders, String? requestMethod})

A database adapter that uses Json files as a data source.

const

Properties

availableListen → bool

no setter, inherited

collectionPath → String?

The path of the destination as a collection.

final, inherited

database → NoSqlDatabase

Designated database.

no setter, inherited

hashCode → int

The hash code for this object.

no setter, inherited

idKey → String?

Key of the map to be used as ID.

final

initialValue → List<ModelInitialValue>?

Actual data when used as a mock-up.

final, inherited

requestHeaders → Map<String, String>?

A request header sent when making a request as HTTP.

final, inherited

requestMethod → String?

A request method sent when making a request as HTTP.

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

source → String

Data source.

final, inherited

validator → DatabaseValidator?

Specify the permission validator for the database.

final, inherited

Methods

clearAll() → Future<void>

Delete all data in the database.

inherited

deleteDocument(ModelAdapterDocumentQuery query) → Future<void>

Delete data from the platform set by the adapter by passing query.

inherited

deleteOnBatch(ModelBatchRef ref, ModelAdapterDocumentQuery query) → void

Describe the data deletion process when performing a batch.

inherited

deleteOnTransaction(ModelTransactionRef ref, ModelAdapterDocumentQuery query) → void

Describe the data deletion process when performing a transaction.

inherited

disposeCollection(ModelAdapterCollectionQuery query) → void

The associated collection is discarded by passing query.

inherited

disposeDocument(ModelAdapterDocumentQuery query) → void

The destruction of related documents is handled by passing query.

inherited

fromJson(dynamic json) → Map<String, DynamicMap>

Json data List can be retrieved in NoSqlDatabase Map.

override

listenCollection(ModelAdapterCollectionQuery query) → Future<List<StreamSubscription>>

Pass query to monitor the collection.

inherited

listenDocument(ModelAdapterDocumentQuery query) → Future<List<StreamSubscription>>

Pass query to monitor the document.

inherited

loadAggregation<T>(ModelAdapterCollectionQuery query, ModelAggregateQuery<AsyncAggregateValue> aggregateQuery) → Future<T?>

Aggregate queries against data collections to retrieve data.

inherited

loadCollection(ModelAdapterCollectionQuery query) → Future<Map<String, DynamicMap>>

Pass query to the platform set by the adapter to retrieve the collection.

inherited

loadDocument(ModelAdapterDocumentQuery query) → Future<DynamicMap>

Pass query to the platform set by the adapter to retrieve the document.

inherited

loadOnTransaction(ModelTransactionRef ref, ModelAdapterDocumentQuery query) → FutureOr<DynamicMap>

Describe the data acquisition process when performing a transaction.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

runBatch(FutureOr<void> batch(ModelBatchRef ref), int splitLength) → FutureOr<void>

Processes a batch for execution.

inherited

runTransaction(FutureOr<void> transaction(ModelTransactionRef ref)) → FutureOr<void>

Do the processing to execute the transaction.

inherited

saveDocument(ModelAdapterDocumentQuery query, DynamicMap value) → Future<void>

By passing the query and the value to be stored, the data is stored on the platform set by the adapter.

inherited

saveOnBatch(ModelBatchRef ref, ModelAdapterDocumentQuery query, DynamicMap value) → void

Describe the data storage process when performing a batch.

inherited

saveOnTransaction(ModelTransactionRef ref, ModelAdapterDocumentQuery query, DynamicMap value) → void

Describes the data storage process when performing a transaction.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited