Databases
StackOverflow2013
Postsdbo
POObject variables are not changing in the innerscope
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POObject variables are not changing in the innerscope
    primarykey
    data
    text
    <p>I've made a function called Product which I use to create objects in JavaScript. Now I have a function called setProduct which gets data from my database (websql) and sets all these data from the database in the current object. This is my code:</p> <pre><code>function Product(nr, name, description, brand, category, price, tags, color, seccolor, image, sizes, db) { this.nr = nr; this.name = name; this.description = description; this.brand = brand; this.category = category; this.price = price; this.tags = tags; this.color = color; this.seccolor = color; this.image = image; this.sizes = sizes; this.db = db; Product.prototype.setProduct = function(id, cb) { var self = this; var query = "SELECT * from products WHERE id='"+id+"';" var res; this.db.exec(query, function(results) { res = results.rows.item(0); self.nr = res.prod_nr; self.description = res.prod_description; self.brand = res.prod_brand; self.category = res.prod_category; self.price = res.prod_price; self.tags = res.prod_tags; self.color = res.prod_color; self.seccolor = res.prod_sec_color; self.image = res.prod_image; self.sizes = res.available_sizes; self.name = res.prod_name; cb(true); }); }; } </code></pre> <p>this.db = my database object. setProduct calls the exec function from that object. That's this code:</p> <pre><code>Database.prototype.exec = function(query, cb) { this.db.transaction(function(tx) { tx.executeSql(query, [], function(tx, results) { if (typeof(cb) == 'function') { cb(results); } }); }); } </code></pre> <p>I've tried to use several console.logs to see where the data gets lost, but I can't find it somehow. </p> <p>And here is where it goes wrong:</p> <pre><code>$("div#home").off('click').on('click','li', function() { var product = prod; var prod_id = $(this).attr("id"); prod.setProduct(prod_id, function(a) { if (a) { console.log(prod.name); // console.log gives undefined } }); }); } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USAngelo A
    1. USAngelo A
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COUse debugger instead of `console.log()`. PS: it's **very** strange to define prototype functions in the constructor
      singulars
      1. POObject variables are not changing in the innerscope
      1. USzerkms
    2. CO@zerkms what debugger do you mean? Okay thanks for the tip. I'll put the prototype functions outside of the constructor :)
      singulars
      1. POObject variables are not changing in the innerscope
      1. USAngelo A
    3. COfor example - google chrome developer tools js debugger PS: here is an article about when `console.log` may lie to you: http://felix-kling.de/blog/2011/08/18/inspecting-variables-in-javascript-consoles/
      singulars
      1. POObject variables are not changing in the innerscope
      1. USzerkms
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload