Original code from the Point of Sale module
In the point_of_sale module there is a list of objects as the following
module.PosModel = Backbone.Model.extend({
models: {
// [...]
{
model: 'pos.session',
fields: ['id', 'journal_ids','name','user_id','config_id','start_at','stop_at','sequence_number','login_number'],
domain: function(self){ return [['state','=','opened'],['user_id','=',self.session.uid]]; },
loaded: function(self,pos_sessions){
self.pos_session = pos_sessions[0];
var orders = self.db.get_orders();
for (var i = 0; i < orders.length; i++) {
self.pos_session.sequence_number = Math.max(self.pos_session.sequence_number, orders[i].data.sequence_number+1);
}
},
},
{
model: 'product.product',
fields: ['display_name', 'list_price','price','pos_categ_id', 'taxes_id', 'ean13', 'default_code',
'to_weight', 'uom_id', 'uos_id', 'uos_coeff', 'mes_type', 'description_sale', 'description',
'product_tmpl_id'],
domain: [['sale_ok','=',true],['available_in_pos','=',true]],
context: function(self){ return { pricelist: self.pricelist.id, display_default_code: false }; },
loaded: function(self, products){
self.db.add_products(products);
},
// [...]
}
And then the information of the data is loaded like this
load_server_data: function(){
var self = this;
var loaded = new $.Deferred();
var progress = 0;
var progress_step = 1.0 / self.models.length;
var tmp = {}; // this is used to share a temporary state between models loaders
function load_model(index){
if(index >= self.models.length){
loaded.resolve();
}else{
var model = self.models[index];
self.pos_widget.loading_message(_t('Loading')+' '+(model.label || model.model || ''), progress);
var fields = typeof model.fields === 'function' ? model.fields(self,tmp) : model.fields;
var domain = typeof model.domain === 'function' ? model.domain(self,tmp) : model.domain;
var context = typeof model.context === 'function' ? model.context(self,tmp) : model.context;
var ids = typeof model.ids === 'function' ? model.ids(self,tmp) : model.ids;
progress += progress_step;
if( model.model ){
if (model.ids) {
var records = new instance.web.Model(model.model).call('read',[ids,fields],context);
} else {
var records = new instance.web.Model(model.model).query(fields).filter(domain).context(context).all()
}
// [...]
What I have tried. First try
So, I would like to change the domain field of the product.product model. I am trying with this
if (typeof jQuery === 'undefined') { throw new Error('Product multi POS needs jQuery'); }
+function ($) {
'use strict';
openerp.pos_product_multi_shop = function(instance, module) {
var PosModelParent = instance.point_of_sale.PosModel;
instance.point_of_sale.PosModel = instance.point_of_sale.PosModel.extend({
load_server_data: function(){
console.log('-- LOAD SERVER DATA');
var self = this;
self.models.forEach(function(elem) {
if (elem.model == 'product.product') {
// return [['id', 'in', [2]]]; // if I return this domain it works well
domain_loaded = function() {
return new instance.web.Model('product.product').call(
'get_available_in_pos_ids',
[self.pos_session.config_id[0]],
)
}
elem.domain = $.when(domain_loaded);
}
})
var loaded = PosModelParent.prototype.load_server_data.apply(this, arguments);
return loaded;
},
});
}
}(jQuery);
If I return a domain directly it works. But if I replace it with a function that calls a python function with call, the domain is not loaded well: [['sale_ok','=',true],['available_in_pos','=',true]]. I've tried with $.when and without it and it does not work.
In addition elem.domain must be a function because self.pos_session only exists when all the previous model information is executed.
Second try
I have tried this following code as well:
if (elem.model == 'product.product') {
// return [['id', 'in', [2]]]; // if I return the domain like this it works
console.log('>> OLD DOMAIN')
console.log(elem.domain);
elem.domain = function() {
console.log('>>> PRODUCT SESSION');
console.log(self.pos_session);
var product_product_obj = new instance.web.Model('product.product');
return product_product_obj.call(
'get_available_in_pos_ids',
[self.pos_session.config_id[0]],
)
}
console.log('>> NEW DOMAIN')
console.log(elem.domain);
}
So first '>> OLD DOMAIN' is printed, then '>> NEW DOMAIN' and, at last '>>> PRODUCT SESSION' is printed. So the function is executed. But the the domains is not being returned well.
Third try. With "then"
And I cannot use then because I need to do the variable assignation. But on the other hand the assignation is well done becase when I print the new domain the function appears in the log.
Even if I use then I am getting the result well from python
var domain_return = product_product_obj.call(
'get_available_in_pos_ids',
[self.pos_session.config_id[0]],
).then(function(result) {
console.log('>> RESULT: ');
console.log(result)
});
I also tried with other promise, but I get a pending result that is ignored and all the products are shown
elem.domain = function() {
return new Promise(function next(resolve, reject) {
console.log('>>> PRODUCT SESSION');
console.log(self.pos_session);
var product_product_obj = new instance.web.Model('product.product');
var domain_return = product_product_obj.call(
'get_available_in_pos_ids',
[self.pos_session.config_id[0]],
).then(function(result) {
console.log('>> RETURN: ');
console.log(result);
resolve(result);
});
console.log('>> DOMAIN RETURN: ');
console.log(domain_return);
});
}
The rest of the domains of the object are calculated without calling python functions. So I can't copy an example from other place
So, is there a way to avoid the pending result? I cannot use async/await yet.
Maybe to make it syncronous will help but I know this should be avoided
Finally I found a workaround overriding the loaded function where all the products are already loaded
var PosModelParent = instance.point_of_sale.PosModel;
instance.point_of_sale.PosModel = instance.point_of_sale.PosModel.extend({
load_server_data: function(){
let self = this;
self.models.forEach(function(elem) {
if (elem.model == 'product.product') {
elem.fields = ['display_name', 'list_price','price','pos_categ_id', 'taxes_id', 'ean13', 'default_code',
'to_weight', 'uom_id', 'uos_id', 'uos_coeff', 'mes_type', 'description_sale', 'description',
'product_tmpl_id', 'available_in_pos_ids'];
elem.loaded = function(self, products){
console.log('>> PRODUCTS: ');
console.log(products);
var shop_id = self.pos_session.config_id[0];
var new_products = [];
products.forEach(function(prod) {
if (prod.available_in_pos_ids.includes(shop_id)) {
new_products.push(prod);
}
})
self.db.add_products(new_products);
}
}
})
var loaded = PosModelParent.prototype.load_server_data.apply(this, arguments);
return loaded;
},
});