CODEWITHSUNDEEP
node.jspg-promise
MrJibus
MrJibus

Reputation: 113

pg-promise: Updating row with array text column with pgp.helpers.update

I am trying to update a text array column :

var data = [];

for (const tag of tags) {
    var tmp = {'rids': [rid], 'id': tag.id, 'uid' : uid};
    data.push(tmp);
}

const condition = pgp.as.format(' WHERE CAST(v.uid AS INTEGER) = t.uid and v.id = t.id');
const insertQuery = pgp.helpers.update(data, ['?id', '?uid', 'rids'], 'table_tags') + condition + ' ' + 'RETURNING t.tag';


return db.any(insertQuery);

This works but it replaces the columns value.

How to keep the current column value and append the new ones ?

Like this : {somevalue, someothervalue, newinsertedvalue} Instead of : {newinsertedvalue}

This is the query i used to use in a php drupal project :

db_query("UPDATE table_tags set rids = rids || (:rid) WHERE uid = :uid and id = :id", array(':rid' => '{'.$rid.'}', ':uid' => $uid, ':id' => $tag_id));

Upvotes: 1

Views: 742

Answers (1)

vitaly-t
vitaly-t

Reputation: 25840

Your value-concatenation logic is a special case, not supported by the default update. You will have to write the query statically, with the dynamic part - values, generated via helpers.values function.


const values = helpers.values(data, ['id', 'uid', 'rids']);

const query = `UPDATE table_tags AS t SET rids = t.rids || v.rids FROM 
    (VALUES${values}) as v(id, uid, rids)
    WHERE CAST(v.uid AS INTEGER) = t.uid AND v.id = t.id RETURNING t.tag`.

Upvotes: 3

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