node.js - Add Column with random value Sequelize PostgreSQL -


i want add column not_null constraint column contain random default values following code how can this

up: function (queryinterface, sequelize, done) { queryinterface.addcolumn(     {       tablename: 'sometable',       schema: 'sometemplate'     },     'somecolumn', //column name     { //column date type , constraint         type: sequelize.string,         allownull: false,         defaultvalue: // want random value     })     .then(function () { done() })     .catch(done); }

postgresql example:

create or replace function f_random_text(     length integer ) returns text $body$ chars (     select unnest(string_to_array('a b c d e f g h j k l m n o p q r s t u v w x y z 0 1 2 3 4 5 6 7 8 9', ' ')) _char ), charlist (     select _char chars order random() limit $1 ) select string_agg(_char, '') charlist ; $body$ language sql;   drop table if exists tmp_test;   create temporary table tmp_test (     id serial,     data text default f_random_text(12) );   insert tmp_test values      (default, default),     (default, default) ;   select * tmp_test;   id |     data ----+--------------   1 | rymujh4e0niq   2 | 7u4029bokaej (2 rows)

apparently can this. (of course, can add other characters well, or use other random string generator - this, example.) ref: https://dba.stackexchange.com/questions/19632/how-to-create-column-in-db-with-default-value-random-string


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