TypeError: undefined is not a function(near '...sql.transaction...')

I got the error like this:TypeError: undefined is not a function(near ‘…sql.transaction…’) my code is: import SQLite from ‘react-native-sqlite-storage’;

SQLite.DEBUG(true); SQLite.enablePromise(true); var database_name = “test.db”;//数据库文件 var database_version = “1.0”; var database_displayname = “MySQLite”; var database_size = -1; var sql; let tableName = ‘user’;

export default class InitSql { init(){ sql = SQLite.openDatabase( database_name, database_version, database_displayname, database_size, ()=>{ // this._successCB(‘open’); this.createTable(); }, (err)=>{ console.log("SQL Error: " + err); } ); }

 create(){
     sql.transaction((tx)=>{
         tx.executeSql(`CREATE TABLE IF NOT EXISTS ${tableName}(
          ${UserBean.id} INTEGER PRIMARY KEY  AUTOINCREMENT,
          ${UserBean.num} VARCHAR,
          ${UserBean.name} VARCHAR)`
             , [],_openCB,_errorCB)
     });
 }

}

when I used ‘create’ to create a table,I got this error.And I tried another way like this: SQLite.openDatabase({name: ‘my.db’, location: ‘default’}, (DB)=>{ sql=DB; }, errorcb); And not work too.

[maxlxq]

解决了吗，我前几天发现修改为SQLite.enablePromise(false);就可以了

[Amacelia]

Giving my two cents because I’ve reached this page (even though it’s been three years since the original question, and two years since the last comment)

Seems as though you can do: SQLite.DEBUG(true); SQLite.enablePromise(true);

And then use this ‘new promise’ section to handle it:

    return new Promise((resolve) => {
      db.transaction(function(tx) {
        //get last/most recent table name
        //read last 10 values from table
        tx.executeSql(
          'SELECT name FROM sqlite_master WHERE type="table"',
          [],
          function(tx, results) {
            var currTableNum = results.rows.length - 1;
            var currTableName = results.rows.item(currTableNum);
            console.log('PPM: ...reading last 10 values from table', currTableName);
            this.setState({tableName: currTableName});
          }
        );
        console.log('printing currtablename: ', this.state.tableName);
        tx.executeSql(
          'SELECT * FROM "?" ORDER BY ppm DESC LIMIT 10',
          [this.state.tableName],
          function(tx, results) {
            var total = 0;
            for (let i = 0; i < results.rows.length; i++) {
              total = total + results.rows.item(i);
              console.log('PPM: item to add: ', results.rows.item(i));
            }
            total = total / results.rows.length;
            console.log('PPM: setting ppmVal state: ', total);
            this.setState({ppmVal: total});
          }
        );
      });
    });
  }