Category : database

My code contains a head file redis.h and a c++ source file redis.cpp. This is a demo of sadd opeaion in redis. All the operations fail, becase of WRONGTYPE Operation against a key holding the wrong kind of value. I don’t know what happened. Please give me some suggestions. //redis.h #ifndef _REDIS_H_ #define _REDIS_H_ #include ..

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I am following the step-by-step example from https://firebase.google.com/codelabs/firebase-android. I am trying to start the emulator from the terminal (in Windows) with firebase emulators:start or with firebase emulators:start –project=demo-friendlychat-android, but I always get the error Error: TIMEOUT: Port 9000 on localhost was not active within 60000ms. How can I resolve? Source: Windows..

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Qt 5.15.2 (Linux) DB: PostgreSQL 13 (Linux) Updating a DB record using QSqlTableModel setData returns false on a second row. A query on the model’s lastError returns an empty string. Table preparation: create table email (nr integer NOT NULL,id serial primary key,priority integer not null,address varchar(100)) insert into email (nr, priority, address) values (358, 1, ..

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