I am trying:
if (process.NODE_ENV === 'test') {
foreignKeyChecks = 0;
forceSync = true;
} else {
foreignKeyChecks = 1;
forceSync = false;
}
global.db.sequelize.query("SET FOREIGN_KEY_CHECKS = " + foreignKeyChecks).then(function() {
return global.db.sequelize.sync({
force: forceSync
});
}).then(function() {
return global.db.sequelize.query('SET FOREIGN_KEY_CHECKS = 1');
}).then(function() {
var server;
console.log('Initialzed database on:');
console.log(config.db);
return server = app.listen(port, function() {
return console.log("Server listening at http://" + (server.address().address) + ":" + (server.address().port));
});
})["catch"](function(err) {
return console.log('err', err);
});
module.exports = app;
But I get: SequelizeDatabaseError: unrecognized configuration parameter "foreign_key_checks"
I assume I can't have that keyword in postgres? But is there an equivalent way to drop all tables and recreate?
This is an updated answer, targeted at the googlers who wound up here like me.
Sequelize offers a drop function:
drop(options) => promise
Drop all tables defined through this sequelize instance. This is done by calling Model.drop on each model. Sequelize docs
Example
var sequelize = new Sequelize(config.database, config.username, config.password, config);
var someModel = sequelize.define('somemodel', {
name: DataTypes.STRING
});
sequelize
.sync() // create the database table for our model(s)
.then(function(){
// do some work
})
.then(function(){
return sequelize.drop() // drop all tables in the db
});
For wiping out data and create all again from scratch (like in tests):
sequelize.sync({force: true});
I don't know anything about that JavaScript library, but Postgres provides a single command to drop everything that is owned by a user:
drop owned by <our_user_name cascade
This will only work if everything is owned by the same user and that user doesn't have some tables (or views, sequences, ...) that you do not want to drop.
More details in the manual:
http://www.postgresql.org/docs/current/static/sql-drop-owned.html
For anyone looking for a solution with sequelize-cli checkout this link Sequelize CLI:
You can just run:
sequelize_cli db:drop
sequelize_cli db:create
To create or drop your db using the cli tool. This way you will have a empty db.
Related
I would like to update several row of my db with the same object.
let say I have a column customText type jsonb which contains an array of object
here my sequelize model :
customText: {
type: DataTypes.JSONB,
allowNull: true,
field: "custom_text"
}
Now from client I send an object:
const obj = {}
const data = {
textid: "d9fec1d4-0f7a-2c00-9d36-0c5055d64d04",
textLabel: null,
textValue: null
};
obj.customText = data
api.service("activity").patch(null, obj).catch(err => console.log(err));
Like the documentation from feathers.js said if I want to replace multiple record, I send an id equal to null.
So now here come the problem, if I do that my column customText will contain the new object only but I want an array of object, so I want to push the new data in the array. How can I patch the data?
My guess is to use a hook in feathers.js and a raw query with sequelize. But I'm not sure how to do that.
I'm not really sure of my answer but this hook work :
module.exports = function() {
return async context => {
debugger;
const sequelize = context.app.get("sequelizeClient");
const customText = JSON.stringify(context.data.customText[0]);
console.log(customField);
let query =
"UPDATE activity SET custom_text = custom_text || '" +
customText +
"' ::jsonb";
console.log(query);
await sequelize
.query(query)
.then(results => {
console.log(results);
context.results = results;
})
.catch(err => console.log(err));
return context;
I still have a problem because after this hook in feathers, the patch continue so it will update my db again.. so i put a disallow() hook.
Also, with this hook i lost the abilities to listening to event
Also i have a concern with the query, i'm not sure if it's better to use :jsonb_insert over ||
I recently found out how to change the value of an existing property and saving it to the mongo database when using Keystone JS (How to alter a value before storing it to the database in Keystone JS).
Now I need to add a new property and save it to the database during the same pre('save') phase.
The aims is to say, if the result (existing property) of a game is 'Won', then add a new property 'won' which is a boolean (true). If it matters, the reason I want this is because in a handlebars template I want to say {{#if won}}class="success"{{/if}}
Game.schema.pre('save', function(next) {
if (this.isModified('result')) {
if (this.result === 'Won') {
this.won = true;
}
}
next()
});
But nothing happens. I read that you can't add properties unless they've been set in the schema. So I tried adding Game.schema.set('won', false); above that, but still nothing.
Is there a simple way to do this?
You could look at Mongoose virtuals which are properties that you can get and set but that do not get persisted to the database:
Game.schema.virtual('won').get(function() {
return this.result === 'Won'
})
http://mongoosejs.com/docs/guide.html#virtuals
If you just want to use it in your template then you could also set a specific property on locals in your view.
Perhaps something like this:
...
exports = module.exports = function(req, res) {
var view = new keystone.View(req, res)
var locals = res.locals
locals.games = []
view.on('init', function(next) {
var query = {} // Add query here
Game.model.find(query).exec(function(err, games) {
// Handle error
games.forEach(function(game) {
game.won = game.result === 'Won'
})
locals.games = games
})
})
}
...
I have a some models generated from postgresql db using looback-connector postgresql. Id column of these models is a auto incremented integer column of postgresql db.
1) I have a remote method added on one of persisted models, where i perform simple update or insert(upsert.
Car.CreateOrUpdateCar = function (carobj, req) {
Car.upsert(Carobj, function (err, Car) {
if (err)
console.log(err);
else {
req(err, Car);
}
});
};
2) have added a remote hook to execute after this remote method.
Car.afterRemote('CreateOrUpdateCar', function (context, remoteMethodOutput, next) {
//Remaining code goes here
next();
});
3) I want to use Id of newly inserted row in step (1), in the remote hook mentioned in step (2)
I don't have much idea about postgresql db. But Try it like this
var carObj;
Car.CreateOrUpdateCar = function (carobj, req) {
Car.upsert(Carobj, function (err, Car) {
if (err)
console.log(err);
else {
req(err, Car); // Your Car object contains final result after upserting along with Id
carObj = Car;
}
});
};
Now you can get id by using carObj.id and you can use it where ever you want. I hope this helps
You can access to generated id in remote hook like this :
Car.afterRemote('CreateOrUpdateCar', function (context, remoteMethodOutput, next) {
var genId = remoteMethodOutput.id || context.result.id;
next();
});
I am using postgresql, knex, and bookshelf to make queries to update my users table. I would like to find all users who didn't sign in during a specific time and then update their numAbsences and numTardies field.
However it appears that when running a raw sql query using bookshelf.knex the result that I get for users is an array of objects rather than an array of bookshelf objects of objects because I can't save the objects directly to the database when I try to use .save(). I get the exception user.save is not a function.
Does anyone know how I can update the values in the database for the users? I've seen the update function but I need to also return the users in absentUsers so I select them currently.
// field indicates whether the student was late or absent
var absentUsers = function(field){
// returns all users who did not sign in during a specific time
if (ongoingClasses){
return bookshelf.knex('users')
.join('signed_in', 'signed_in.studentId', '=', 'users.id')
.where('signed_in.signedIn', false)
.select()
.then(function(users){
markAbsent(users, field);
return users;
});
}
}
var markAbsent = function(users, field){
users.forEach(function(user){
user[field]++;
user.save();
})
}
I've solved my problem by using another sql query in knex. It seemed there was no way to use a sql query and then use standard bookshelf knex methods since the objects returned were not bookshelf wrapper objects.
var absentUsers = function(field){
// returns all users who did not sign in during a specific time
if (ongoingClasses){
return bookshelf.knex('users')
.join('signed_in', 'signed_in.studentId', '=', 'users.id')
.where('signed_in.signedIn', false)
.select()
.then(function(users){
markAbsent(users, field);
});
}
}
var markAbsent = function(users, field){
users.forEach(function(user){
var updatedUser = {};
updatedUser[field] = user[field]+1;
bookshelf.knex('users')
.where('users.id', user.id)
.update(updatedUser).then(function(){
});
});
}
With your code bookshelf.knex('users') you leave the "Bookshelf world" and are in "raw knex world". Knex alone doesn't know about your Bookshelf wrapper objects.
You may use Bookshelf query method to get the best of both worlds.
Assuming your model class is User, your example would look approximately like
User.query(function(qb) {
qb.join('signed_in', 'signed_in.studentId', 'users.id')
.where('signed_in.signedIn', false);
})
.fetchAll()
.then(function(bookshelfUserObjects) {
/*mark absent*/
return bookshelfUserObjects.invokeThen('save'); // <1>
});
<1> invokeThen: Call model method on each instance in collection
JS beginner trying to get a PostgreSQL DB talking to express.js through bookshelf.js.
github: https://github.com/duskyshelf/bookers-academy/blob/master/booker.js
var knex = require('knex')({
client: 'pg',
connection: "postgres://localhost/bookers"
});
var bookshelf = require('bookshelf')(knex);
var User = bookshelf.Model.extend({
tableName: 'users'
});
var bob = new User({id: 2});
bob.save()
bookshelf.js seems unable to add any content to the db.
Current error message is: "Unhandled rejection CustomError: No Rows Updated'
When you create your model providing your own id, like in
var bob = new User({id: 2});
Bookshelf assumes it is an update operation, not an insertion. It sets the internal isNew attribute to false, and when save() is invoked, instead of INSERT INTO user(id, ...) VALUES (2, ...);, it executes UPDATE user ... WHERE id = 2;.
If there is no user with id = 2 the update will almost silently DO NOTHING.
To force an insert you must change the save() to:
bob.save(null, {method: 'insert'});
Bookshelf save() documentation describes this behavior.
Did you create a User table using knex? One potential problem I can think of is that you do not have any logic that actually creates the table for your Postgres DB. Here is some sample code that will create a table in your database if it doesn't yet exist.
bookshelf.knex.schema.hasTable('User').then(function(exists) {
if(!exists) {
bookshelf.knex.schema.createTable('User'), function(user) {
user.increments('id').primary();
user.timestamps();
}).then(function(table){
console.log('Created Table:', table);
});
}
});
new User({id: 2}).
save().
then((model) => {
res.json({ success: true });
});
No no! new User returns a PROMISE! You can't use it like that.
Try
new User().save()