当我尝试在Heroku上使用PGSQL更新数据库时，出现22001错误

Question

I am working on a project that uses KnexJS with PGSQL on Heroku. My issue is that when I update the signature_url field (text), I receive a PGSQL 22001 error (details listed below). The thing that is being updated into the signature_url field is a string created by the .toDataUrl() JavaScript method. This method returns a string that is 16,158 characters long. This all seems to work fine when using SQLite3 in development but breaks when I try to update via PGSQL on Heroku.

Here are my migrations:

exports.up = function(knex, Promise) {
  return knex.schema.createTable('contracts', function (table) {
    table.increments('id')
    table.integer('owner_id')
    table.integer('signee_id')
    table.string('contract_header')
    table.text('contract_desc')
    table.text('signature_url')
    table.string('date_signed')
    table.boolean('isSigned')
  })
  };

exports.down = function(knex, Promise) {
  return knex.schema.dropTable('contracts')
};

Here are my original seeds:

exports.seed = function(knex, Promise) {
  // Deletes ALL existing entries
  return knex('contracts').del()
    .then(function () {
      // Inserts seed entries
      return knex('contracts').insert([
        {owner_id: 1, signee_id: 2, contract_header: 'Rugby Coaching Position', contract_desc: 'Curabitur non nulla sit amet nisl tempus convallis quis ac lectus. Praesent sapien massa, convallis a pellentesque nec, egestas non nisi. Donec sollicitudin molestie malesuada.', signature_url: '', date_signed: '', isSigned: false},
        {owner_id: 1, signee_id: 2, contract_header: 'Arts Perfomance', contract_desc: 'Curabitur non nulla sit amet nisl tempus convallis quis ac lectus. Praesent sapien massa, convallis a pellentesque nec, egestas non nisi. Donec sollicitudin molestie malesuada.', signature_url: '', date_signed: '', isSigned: false},
        {owner_id: 2, signee_id: 1, contract_header: 'Field Trip', contract_desc: 'Curabitur non nulla sit amet nisl tempus convallis quis ac lectus. Praesent sapien massa, convallis a pellentesque nec, egestas non nisi. Donec sollicitudin molestie malesuada.', signature_url: '', date_signed: '', isSigned: false}
      ]);
    });
};

This is the object that is returned when checking the network on Dev Tools.

code:"22001"
file:"varchar.c"
length:99
line:"624"
name:"error"
routine:"varchar"
severity:"ERROR"

db.js

function signContract (id, signatureUrl) {
  return knex('contracts').where('id', id)
  .update({ signature_url: signatureUrl })
}

knexfile.js

module.exports = {

  development: {
    client: 'sqlite3',
    connection: {
      filename: './dev.sqlite3'
    }
  },

  staging: {
    client: 'postgresql',
    connection: {
      database: 'my_db',
      user:     'username',
      password: 'password'
    },
    pool: {
      min: 2,
      max: 10
    },
    migrations: {
      tableName: 'knex_migrations'
    }
  },

  test: {
  client: 'sqlite3',
  connection: {
    filename: './dev.sqlite3'
  }
},

  production: {
    client: 'postgresql',
    connection: process.env.DATABASE_URL,
    pool: {
      min: 2,
      max: 10
    },
    migrations: {
      tableName: 'knex_migrations'
    }
  }

};

Answer 1

You are trying to insert data into a varchar column, but the length of the string exceeds the length of the column.

You can either insert a shorter string or use ALTER TABLE to increase the length of the varchar column.

Answer 2

Try to check your types for your columns. Because your error states that you are trying to put big value inside small type. Check your table definition in psql interface with \\d table_name .

If you see non- text columns – try to replace them with

ALTER TABLE tbl_name ALTER COLUMN col_name TYPE text;

I prefer using text fields

UPD: And try to check your NODE_ENV variable inside of your application. Maybe you are connected to sqlite database. I tried to reproduce your situation on my local postgres and everything works just fine.

PS And why don't you use postgres for development/test environments? For example, you'll need some postgres -only features in your app, so that means you cannot test your app in development. But this goes beyond this question.

Answer 3

Cheers for your help people! I've taken your ideas and applied it to KnexJS by modifying my table.string("signature_url") column by declaring a value for the maximum character length table.string("signature_url", 17000) . This seems to of worked!