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https://github.com/Kitura/Kitura-CouchDB
CouchDB adapter for Kitura
https://github.com/Kitura/Kitura-CouchDB
cloudant couchdb couchdb-client database kitura nosql
Last synced: about 1 month ago
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CouchDB adapter for Kitura
- Host: GitHub
- URL: https://github.com/Kitura/Kitura-CouchDB
- Owner: Kitura
- License: apache-2.0
- Created: 2016-02-05T16:28:14.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2021-08-19T09:47:22.000Z (about 3 years ago)
- Last Synced: 2024-05-21T06:06:48.330Z (4 months ago)
- Topics: cloudant, couchdb, couchdb-client, database, kitura, nosql
- Language: Swift
- Homepage:
- Size: 803 KB
- Stars: 50
- Watchers: 33
- Forks: 28
- Open Issues: 12
-
Metadata Files:
- Readme: README.md
- Contributing: .github/CONTRIBUTING.md
- License: LICENSE.txt
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README
# Kitura-CouchDB
Kitura-CouchDB is a pure Swift client which allows Kitura applications to interact with a CouchDB or Cloudant database.
## Usage
#### Add dependencies
Add the `Kitura-CouchDB` package to the dependencies within your application’s `Package.swift` file. Substitute `"x.x.x"` with the latest `Kitura-CouchDB` [release](https://github.com/Kitura/Kitura-CouchDB/releases).
```swift
.package(url: "https://github.com/Kitura/Kitura-CouchDB.git", from: "x.x.x")
```
Add `CouchDB` to your target's dependencies:
```swift
.target(name: "example", dependencies: ["CouchDB"]),
```
#### Import package
```swift
import CouchDB
```
## Run Kitura-CouchDB Sample
To run the CouchDB Sample, you must set up and connect to a local CouchDB database by following the steps below:
1. [Download and install CouchDB.](http://couchdb.apache.org/#download)
2. Set up an admin username and password in CouchDB.
3. Create a database with the name `kitura_test_db`.
4. Clone this repository:
```bash
git clone https://github.com/Kitura/Kitura-CouchDB.git
```
5. Update the following code in `Sources\CouchDBSample\main.swift` with your admin username and password (the host will default to 127.0.0.1 and the port will default to 5984):
```swift
let connProperties = ConnectionProperties(
host: host, // http address
port: port, // http port
secured: secured, // https or http
username: nil, // admin username
password: nil // admin password
)
```
6. Open a Terminal window, change into the `Kitura-CouchDB` folder and run `swift build`:
```bash
swift build
```
7. Run the CouchDBSample executable:
```bash
.build/debug/CouchDBSample
```
You should see informational messages such as "Successfully created the following JSON document in CouchDB:" for each of the operations (create, read, update and delete) performed on the `kitura_test_db` database.
## API Documentation
#### Document
CouchDB is a NoSQL database for storing documents. A `Document` is any structure that can be represented as JSON and contains `_id` and `_rev` fields.
- The `_id` field is the unique identifier for the document. If it is not set, a random UUID will be assigned for the document.
- The `_rev` field is the revision of the document. It is returned when you make requests and is used to prevent conflicts from multiple users updating the same document.
To define a CouchDB document, create a Swift object and make it conform to the `Document` protocol:
```swift
struct MyDocument: Document {
let _id: String?
var _rev: String?
var value: String
}
```
#### CouchDBClient
The `CouchDBClient` represents a connection to a CouchDB server. It is initialized with your `ConnectionProperties` and handles the creation, retrieval and deletion of CouchDB databases.
```swift
// Define ConnectionProperties
let conProperties = ConnectionProperties(
host: "127.0.0.1", // http address
port: 5984, // http port
secured: false, // https or http
username: "", // admin username
password: "" // admin password
)
// Initialize CouchDBClient
let couchDBClient = CouchDBClient(connectionProperties: conProperties)
```
- Create a new database
```swift
couchDBClient.createDB("NewDB") { (database, error) in
if let database = database {
// Use database
}
}
```
- Get an existing database
```swift
couchDBClient.retrieveDB("ExistingDB") { (database, error) in
if let database = database {
// Use database
}
}
```
- Delete a database
```swift
couchDBClient.deleteDB("ExistingDB") { (error) in
if let error = error {
// Handle the error
}
}
```
#### Database
The `Database` class is used to make HTTP requests to the corresponding CouchDB database. This class can make CRUD (Create, Retrieve, Update, Delete) requests for:
- A single CouchDB `Document`
- An array of CouchDB documents
- A CouchDB `DesignDocument`
- A `Document` attachment
The following code demonstrates the CRUD operations for a single `Document`:
```swift
var myDocument = MyDocument(_id: "Kitura", _rev: nil, value: "Hello World")
```
- Create a Document:
```swift
database.create(myDocument) { (response, error) in
if let response = response {
print("Document: \(response.id), created with rev: \(response.rev)")
}
}
```
- Retrieve a Document:
```swift
database.retrieve("Kitura") { (document: MyDocument?, error: CouchDBError?) in
if let document = document {
print("Retrieved document with value: \(document.value)")
}
}
```
- Update a Document:
```swift
myDocument.value = "New Value"
database.update("Kitura", rev: "", document: myDocument) { (response, error) in
if let response = response {
print("Document: \(response.id), updated")
}
}
```
- Delete a Document:
```swift
database.delete("Kitura", rev: "") { (error) in
if error == nil {
print("Document successfully deleted")
}
}
```
For more information visit our [API reference](https://ibm-swift.github.io/Kitura-CouchDB/index.html).
## Community
We love to talk server-side Swift, and Kitura. Join our [Slack](http://swift-at-ibm-slack.mybluemix.net/) to meet the team!
## License
This library is licensed under Apache 2.0. Full license text is available in [LICENSE](https://github.com/Kitura/Kitura-CouchDB/blob/master/LICENSE.txt).