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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | 1x 1x 1x 1x 1x 4x 4x 4x 4x 4x | import { Logger } from "../../../logger";
import { IRequest } from "../../../server/request";
import { DataType } from "../../data/data-type";
import { Database } from "../../data/database";
import { DatabaseValue } from "../../data/database-value";
import { RedisToken } from "../../protocol/redis-token";
import { IRespCommand } from "../resp-command";
/**
* ### Available since 2.0.0
* ### HGET key field
* Returns the value associated with field in the hash stored at key.
*
* ### Return value
* Bulk string reply: the value associated with field, or nil when field is not
* present in the hash or key does not exist.
*/
export class HgetCommand extends IRespCommand {
public dbDataType = DataType.HASH
public maxParams = 2
public minParams = 2
public name = "hget"
private logger: Logger = new Logger(module.id);
public execSync(request: IRequest, db: Database): RedisToken {
this.logger.debug(
`${request.getCommand()}.execute(%s)`,
...request.getParams()
);
// Get the original HASH
const item: DatabaseValue = db.get(request.getParam(0));
if (!item) {
return RedisToken.nullString();
}
const hash = item.getHash();
if (!hash[request.getParam(1)]) {
return RedisToken.nullString();
}
return RedisToken.string(hash[request.getParam(1)]);
}
}
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