How to add multiple rows using "Insert ... ON DUPLICATE KEY UPDATE" using knex

Question

so I've been playing around with knex lately, however I found myself on a situation where I don't know what to do anymore.

so I have this query:

knex.raw("INSERT INTO tablename (`col1`, `col2`, `col3`) VALUES (?, ?, ?) 
ON DUPLICATE KEY UPDATE col2 = VALUES(`col2`)", 
[
    ['val1', 'hello', 'world'],
    ['val2', 'ohayo', 'minasan'],
]);

And for some reasons It throws me an error Expected 2 bindings, saw 3.

I tried making it:

knex.raw("INSERT INTO tablename (`col1`, `col2`, `col3`) VALUES (?, ?, ?) 
ON DUPLICATE KEY UPDATE col2 = VALUES(`col2`)", 
    ['val1', 'hello', 'world'],
    ['val2', 'ohayo', 'minasan'],
);

No error this time, but it only inserts the first array.

I also tried making the values an object:

[
    {col1: 'val1', col2: 'hello', col3: 'world'},
    {col1: 'val2', col2: 'ohayo', col3: 'minasan'},
]

But still no luck.

Answer 1

I wrote this code to insert/update either a single row as an object or multiple rows as an array of objects:

function insertOrUpdate(knex: Knex, tableName: string, data: any) {
  const firstData = data[0] ? data[0] : data;
  return knex.raw(knex(tableName).insert(data).toQuery() + " ON DUPLICATE KEY UPDATE " +
    Object.getOwnPropertyNames(firstData).map((field) => `${field}=VALUES(${field})`).join(", "));
}