Getting Started
To start this project please first create a .env file in the root of your project with the following:
REACT_APP_ASTRA_TOKEN={your_astra-token}
In your Datastax Astra Dashboard, create a keyspace called 'coins'. Then navigate to your GraphQL playground and make sure you are at the endpoint ending with graphql-admin.
Eg: https://5892dddf-ff9a-4b40-aa31-aa97de1a0966-westeurope.apps.astra.datastax.com/api/graphql-admin
Once there, make sure to add the following to the HTTP Header to authorize access:
{
"x-cassandra-token": {your_astra-token}
}
And deploy the following Schema:
mutation {
deploySchema(
keyspace: "coins"
schema: """
type Coin @key @cql_input {
asset_id: String! @cql_column(partitionKey: true)
name: String
category: String @cql_index
price_usd: Float
}
type Mutation {
insertCoin(coin: CoinInput): Coin
}
type Query {
coinsByAssetIds(
asset_ids: [String] @cql_where(field: "asset_id", predicate: IN)
): [Coin]
coinsByCategory(
category: String
): [Coin]
}
"""
) {
version
}
}
Next, go to the endpoint with your keyspace name:
Eg: https://5892dddf-ff9a-4b40-aa31-aa97de1a0966-westeurope.apps.astra.datastax.com/api/graphql/coins
And create some coins:
mutation {
c1: insertCoin(
coin: {
asset_id: "BTC"
name: "Bitcoin"
category: "Crypto"
price_usd: 30724.60
}
) {
asset_id
}
c2: insertCoin(
coin: {
asset_id: "ETH"
name: "Ethereum"
category: "Crypto"
price_usd: 1817.46
}
) {
asset_id
}
c3: insertCoin(
coin: {
asset_id: "GBP"
name: "Great British Pounds"
category: "Currency"
price_usd: 1.37
}
) {
asset_id
}
}
To run this project please type the following commands:
npm i
This will install all the necessary dependencies.
npm run start-deals
This will start the Deals Service on http://localhost:4001
npm run start-gateway (in a new tab)
This will start the gateway with data from both the Deals Service and DataStax on http://localhost:4000
npm run start (in a new tab)
Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.
The page will reload if you make edits.
You will also see any lint errors in the console.
To learn React, check out the React documentation.
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