Angular SQLITE.ALL准备1

在我的NativeScript with Angular项目中，我尝试使用SQLite创建数据库。但是，每当我尝试运行它时，我的create table语句总是会出现一个错误，上面写着

SQLITE.ALL-Prepare error 1

。我试着查找这个问题，但实际上找不到任何有关它的东西

这是我的

数据库.service.ts

文件：

var Sqlite = require("nativescript-sqlite");

@Injectable()
export class DatabaseService {

    private createDB() {
        return new Promise((resolve, reject) => {
            return (new Sqlite("imtracker.db")).then(db => {
            db.execSQL("CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, password TEXT, firstName TEXT, lastName TEXT, gender TEXT, permissions TEXT, year INTEGER, basketball NUMERIC, dodgeball NUMERIC, football NUMERIC, soccer NUMERIC, softball NUMERIC, volleyball NUMERIC, teamID INTEGER)").then(id => {
                resolve(db);
            }, error => {
                console.log("CREATE USESRS TABLE ERROR: ", error);
                reject(error);
            });
            db.execSQL("CREATE TABLE IF NOT EXISTS leagues (id INTEGER PRIMARY KEY AUTO INCREMENT, teamSize INTEGER, sportID INTEGER)").then(id => {
                resolve(db);
            }, error => {
                console.log("CREATE LEAGUES TABLE ERROR: ", error);
                reject(error);
            });
        }, error => {
            reject(error);
        })
    })
}

public insertUser(user: User) {
    return new Promise((resolve, reject) => {
        this.createDB().then((res: any) => {
            res.execSQL("INSERT INTO users (id,password,firstName,lastName,gender,permissions,year,basketball,dodgeball,football,soccer,softball,volleyball,teamID) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?)", [user.id, user.password, user.firstName, user.lastName, user.gender, user.permissions, user.year, user.basketball, user.dodgeball, user.football, user.soccer, user.softball, user.volleyball, user.teamID]).then(id => {
                console.log("INSERT RESULT: ", id);
                resolve(true);
            }, error => {
                console.log("INSERT USERS FAILED: ", error);
                reject(false);
            })
        })
    })
}

public insertLeague(league: Leagues) {
    return new Promise((resolve, reject) => {
        this.createDB().then((res: any) => {
            res.execSQL("INSERT INTO leagues (id,teamSize,sportID) VALUES (?,?,?)", [league.id, league.teamSize, league.sportID]).then(id => {
                console.log("INSERT RESULT: ", id);
                resolve(true);
            }, error => {
                console.log("INSERT LEAGUES FAILED: ", error);
                reject(false);
            })
        })
    })
}

public selectAllUsers() {
    return new Promise((resolve, reject) => {
        this.createDB().then((res: any) => {
            return res.all("SELECT * FROM user").then(rows => {
                let result: User[] = [];
                for (let row in rows) {
                    result.push({
                        "id": rows[row][1],
                        "password": rows[row][2],
                        "firstName": rows[row][3],
                        "lastName": rows[row][4],
                        "gender": rows[row][5],
                        "permissions": rows[row][6],
                        "year": rows[row][7],
                        "basketball": rows[row][8],
                        "dodgeball": rows[row][9],
                        "football": rows[row][10],
                        "soccer": rows[row][11],
                        "softball": rows[row][12],
                        "volleyball": rows[row][13],
                        "teamID": rows[row][14]
                    });
                }
                resolve(result);
            }, error => {
                console.log("SELECT USERS ERROR: ", error);
                reject(error);
            })
        })
    })
}

public selectAllLeagues() {
    return new Promise((resolve, reject) => {
        this.createDB().then((res: any) => {
            return res.all("SELECT * FROM leagues").then(rows => {
                let result: Leagues[] = [];
                for (let row in rows) {
                    result.push({
                        "id": rows[row][1],
                        "teamSize": rows[row][2],
                        "sportID": rows[row][3]
                    });
                }
                resolve(result);
            }, error => {
                console.log("SELECT LEAGUES ERROR: ", error);
                reject(error);
            })
        })
    })
  }
}

下面是我的模型：

leagues.model.ts：

export interface Leagues {
    id: number,
    teamSize: number,
    sportID: number
}

export interface User {
    id: number,
    password: string,
    firstName: string,
    lastName: string,
    gender: string,
    permissions: string,
    year: number,
    basketball: boolean,
    dodgeball: boolean,
    football: boolean,
    soccer: boolean,
    softball: boolean,
    volleyball: boolean,
    teamID: number
}

user.model.ts：

export interface Leagues {
    id: number,
    teamSize: number,
    sportID: number
}

export interface User {
    id: number,
    password: string,
    firstName: string,
    lastName: string,
    gender: string,
    permissions: string,
    year: number,
    basketball: boolean,
    dodgeball: boolean,
    football: boolean,
    soccer: boolean,
    softball: boolean,
    volleyball: boolean,
    teamID: number
}

下面是我在组件中调用它的地方：

constructor(private router: Router, private databaseService: DatabaseService) {

    this.databaseService.selectAllUsers().then((res: any) => {
        this.usersList = res;
    })
}

---

任何帮助都将不胜感激，因为我现在很困惑。谢谢

我怀疑您访问select查询中的表太早了，甚至在创建查询之前。您必须将

createDB

方法更新为如下内容：

private createDB() {
        return (new Sqlite("imtracker.db")).then(db => {
            return Promise.all([
                db.execSQL("CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, password TEXT, firstName TEXT, lastName TEXT, gender TEXT, permissions TEXT, year INTEGER, basketball NUMERIC, dodgeball NUMERIC, football NUMERIC, soccer NUMERIC, softball NUMERIC, volleyball NUMERIC, teamID INTEGER)")
                    .catch(error => {
                        console.log("CREATE USESRS TABLE ERROR: ", error);
                        throw error;
                    }),
                db.execSQL("CREATE TABLE IF NOT EXISTS leagues (id INTEGER PRIMARY KEY AUTO INCREMENT, teamSize INTEGER, sportID INTEGER)")
                    .catch(error => {
                        console.log("CREATE LEAGUES TABLE ERROR: ", error);
                        throw error;
                    })
            ]).then(() => db);
        });
    }

---

您可以在他们的github回购中打开问题