How to do multiple inserts

This is kind of a noob question, I’m used to using ORMs and decided to go closer to the metal with Knex.

I’m trying to do multiple inserts where the 2nd insert relies on the id of the 1st insert.

Something like this:

    knex("users")
        .insert({ first_name: "John", last_name: "Doe" })
        .exec(function (err, id) {
            knex("groups")
                .insert({ name: "Cool Group" })
                .exec(function (err, id) {
                    // handle results
                });
        });

I might be missing something by not knowing how to use Promises or Transactions properly, but I’d appreciate some help on this very simple problem.

Thanks!

[bendrucker]

With transactions:

return knex.transaction(function (t) {
  return knex("users")
    .transacting(t)
    .insert({ first_name: "John", last_name: "Doe" })
    .then(function (response) {
      return knex('groups')
        .transacting(t)
        .insert({name: 'Cool Group', user_id: response.id})
    })
    .then(t.commit)
    .catch(t.rollback)
})
.then(function () {
  // transaction suceeded, data written
})
.catch(function () {
  // transaction failed, data rolled back
});

[mouhannad-sh]

For anyone on the internet who comes across this issue like I did

you can read this SO answer.

Basically in your up or down handler you need to return a promise so technically you could do something like:

exports.up = function(knex) {
  const columns = ['column_1', 'column_2', 'column_3'];
  const tables = ['table_1', 'table_2'];
  return Promise.all(
    tables
      .map(table =>
        columns.map(col =>
          knex(table)
            .where(col, '=', 'Wrong value')
            .update({ [col]: 'Corrected value' })
        )
      )
      .flat()
  );
};