用pg-promise插入UUID

Question

I am developing a new server and I am trying to have a customer have a UUID identifier. I want to be able to push the customers name, parent company and internal id from a web interface but the uuid should be generated server side. How can I insert the UUID into the database? The uuid should be put into the ID in the table.

The current setup is so I can send the ID in with curl and have it all tested. What the code was doing before was get every value from the terminal. I am trying to modify this working code so that when I create a new customer I can put their name, parent, symID and have a uuid generated into the ID column.

for the symID I also want to pull that from a database of ID's that I currently do not have access to. I do not know if this feature will be implemented so for right now it is just entered either manually or not at all.

I am using pg-promise to write to a postgres database, also using express and bluebird.

//Database setup
...
CREATE TABLE  customer(
  customer_name VARCHAR,
  ID varchar PRIMARY KEY,
  parent VARCHAR,
  symID VARCHAR
);
...

//code to create new user
...
function createUser(req, res, next) {
  const user_id = uuidv4();
  //need to fix id. currently it is user entered and not a uuidv4
  db.none('insert into customer values(${customer_name}, ${ID}, ${parent}, ${symID})',
    req.body)
    .then(function () {
      res.status(200)
        .json({
          status: 'success',
          message: 'Inserted one customer'
        });
    })
    .catch(function (err) {
      return next(err);
  });
}
...

Answer 1

You can generate the UUID automatically with minor change to your table definition:

if not already installed then you need the extension pgcrypto.

    CREATE EXTENSION pgcrypto;  -- if needed

    CREATE TABLE  customer(
      customer_name VARCHAR,
      ID uuid default gen_random_uuid() PRIMARY KEY,
      parent VARCHAR,
      symID VARCHAR
    );

That will generate a type4 uuid. Getting it's value back would be similar to getting the PK created by sequence/serial ( at list I think so ).