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The MIT License (MIT) | ||
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Copyright (c) 2017 Antony Thorpe | ||
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Permission is hereby granted, free of charge, to any person obtaining a copy | ||
of this software and associated documentation files (the "Software"), to deal | ||
in the Software without restriction, including without limitation the rights | ||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
copies of the Software, and to permit persons to whom the Software is | ||
furnished to do so, subject to the following conditions: | ||
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The above copyright notice and this permission notice shall be included in all | ||
copies or substantial portions of the Software. | ||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
SOFTWARE. |
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# knockout-apollo | ||
A knockoutjs extension to connect to a GraphQL endpoint through an ApolloClient instance | ||
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## Approach | ||
* Provide public access to the an instance of the ApolloClient class, as well as, ObservableQuery for the watchQuery/subscribe methods (not fully implemented yet) | ||
* Utilise the structure and loading features of [ko.plus](http://stevegreatrex.github.io/ko.plus/) | ||
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## How it works | ||
Attaches additional methods to Observables/Observable Arrays via a [Custom Function](http://knockoutjs.com/documentation/fn.html). | ||
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## Requirements | ||
* [Apollo Client](https://github.com/apollostack/apollo-client) | ||
* [GraphQL Tag](https://github.com/apollostack/graphql-tag) | ||
* [Knockout](http://knockoutjs.com) | ||
* [ko.plus](http://stevegreatrex.github.io/ko.plus/) | ||
* [jQuery](http://jquery.com) | ||
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## Installation | ||
In the command line: | ||
```sh | ||
npm install --save apollo-client graphql-tag knockout knockout-apollo ko.plus jquery | ||
``` | ||
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## Getting Started | ||
```js | ||
// set the JavaScript template literal tag that parses GraphQL query strings into the standard GraphQL AST | ||
import gql from 'graphql-tag'; | ||
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// Create an ApolloClient | ||
var apolloClient = new ApolloClient({ | ||
networkInterface: createNetworkInterface({ uri: https://yourwebsite.net/graphql}) | ||
}); | ||
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// Next initialise via a Custom Function | ||
this.yourObservable = ko.observable().launchApollo(apolloClient, errorCallback); | ||
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// Now we are ready to make queries etc with Apollo. Outline below: | ||
this.yourObservable.apollo({object for Apollo}, {object of callbacks}); | ||
``` | ||
## Query with Parameters | ||
Server-side, add the corresponding schema and resolver: | ||
```javascript | ||
export const schema = ` | ||
type Query { | ||
ping(message: String!): String | ||
} | ||
schema { | ||
query: Query | ||
} | ||
`; | ||
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export const resolvers = { | ||
Query: { | ||
ping(root, { message }, context) { | ||
return `Answering ${message}`; | ||
}, | ||
}, | ||
}; | ||
``` | ||
And, client-side: | ||
```javascript | ||
var query = gql`query PingMessage($message: String!) { | ||
ping(message: $message) | ||
}`; | ||
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this.yourObservable.apollo( | ||
{ | ||
query: query, | ||
variables: { | ||
message: 'Meow' | ||
} | ||
}, | ||
{ | ||
// callback when successful | ||
resolve: function(data) { | ||
console.log(data); //An ApolloQueryResult | ||
}, | ||
// callback to report errors (optional) | ||
reject: function(error) { | ||
console.log(error); | ||
}, | ||
always: function(){ | ||
// called for both success and failure (optional) | ||
} | ||
} | ||
); | ||
``` | ||
## Templates | ||
Thanks to the `ko.plus` knockout plugin there are a couple of useful public observables. A loading indicator can be used through `yourObservable.apollo.isRunning` and if failed through `yourObservable.apollo.failed`. See [link](https://github.com/stevegreatrex/ko.plus/blob/master/README.md#example-implementation). | ||
## Error Callback | ||
The default is to console log the error. For an alternative, provide a callback function as a second arguement to the `launchApollo` function when initialising (or you can simply pass it in with the call). | ||
## Example | ||
Under the example folder, is code modified from [Learn Apollo](https://www.learnapollo.com). If you want to get this up and running: | ||
* start the `Learn Apollo` React tutorial until you get past the Getting Started section. Note down the Apollo Client configuration. You will need this for line 5 of `index.js`. | ||
* cd to exercise 6 and `npm install` | ||
* copy `index.html` and `index.js` from the example folder and replace the code in exercise 6 | ||
* replace the `client` variable with the configuration noted above from `Learn Apollo`. | ||
* then `npm install --save graphql-tag knockout knockout-apollo ko.plus jquery knockoutcrud` | ||
* To launch a browser `npm start` | ||
Hope this works :) | ||
## Todo | ||
* build Apollo for the browser | ||
* watchQuery | ||
* subscriptions | ||
* tests | ||
## Support | ||
None sorry. | ||
## Change Log | ||
[File](changelog.md) | ||
## Licence | ||
[MIT](LICENCE) |
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# Changelog of Knockout Apollo | ||
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0.1.0 Initial commit - Queries and Mutations |
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<!doctype html> | ||
<html lang="en"> | ||
<head> | ||
<meta charset="utf-8"> | ||
<meta name="viewport" content="width=device-width, initial-scale=1"> | ||
<link rel="shortcut icon" href="./src/favicon.png"> | ||
<title>Pokedex Knockout-Apollo App</title> | ||
</head> | ||
<body> | ||
<div id="knockout"> | ||
<div class="w-100 bg-light-gray min-vh-100"> | ||
<h1 data-bind="visible: trainers.apollo.isRunning">Loading</h1> | ||
<div data-bind="visible: !trainers.apollo.isRunning()" style="display:none"> | ||
<pokedex params="trainers: trainers"></pokedex> | ||
</div> | ||
</div> | ||
</div> | ||
</body> | ||
</html> |
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