Update product price using custom field info

-- HikaShop version -- : 2.3.3
-- Joomla version -- : 3.3.0
-- PHP version -- : 5.4.4
-- Browser(s) name and version -- : chrome 36.0.1985.143

Hi,

I'm trying to get the displayed price on a product page to update using the custom field data. I'm configuring Hikashop for a print business, so have used variants for some options (when selected, these change the displayed product price), but have to also use custom fields (and the plugin) for some other options to stop the number of variants getting too great.

So, for example:
Business card, base price £1.60. Select a variant, and the price will be changed to £1.80. No prob.

Then, I use the custom field to select quantity (eg 10). On the product page the price stays at £1.80, although when I "add to cart", the cart price is fine (£18.00 in this case).

I want the customer to be able to see the impact of their choices when choosing, rather than having to go to the cart page to see the price.

This seems quite simple, but it's got me stuck, sorry if it's something obvious, have trawled the forum etc without joy! Could anyone give me a pointer please?

Other than that, impressed with Hikashop - you seem to have thought of almost everything, great.

Hi,

Why not just use a cart module ?
This allow to show directly the total amount of the order on any website pages.

Hi Xavier,

Thanks, appreciate the reply. I thought about using the cart module too (eventually!), but it doesn't do what I want. I'm trying to get the price to update on the product page, when the visitor selects an option (which it does) or a custom field option (which it doesn't). So, if they have (eg) a business card on standard paper, they select a heavier paper and can see the price change before they "add to basket".

I'm thinking the page must generate an "all in" price, as it's this that the cart picks up once they add to cart, so, it I can use that to display the updated price (I can't see what that is though). Maybe I can do it using the product/option_price view - I'll have a look.

Hi,

So you can use the options, create characteristics, add them to a product and use this product as an option to the desired product (the main one).

Or you can use directly the characteristics, and when changing the characteristic value on the product page the price will be changed automatically.

Here is documentation:
hikashop.com/support/support/documentati...ct-form.html#options
hikashop.com/support/support/documentati...html#characteristics

Hope this is what you are looking for.

Hi,

The Characteristic / Variants way is closest, as this handles all the product aspects, and updates the price when a variant is selected (and before it's added to the basket). The problem with just using variants is that I end up with too many variants, and use up all the php memory allocation (it's easy to end up with over 200 variants).

My approach is to use the variants for the product characteristics that aren't linear in pricing, and then use custom fields for elements that are (linear). Eg, for a product, pages and quantity will not be linear (as the unit price decreases in a non-regular manner as quantity goes up), so these I deal with in variants.

Then paper quality, special finishes are linear, for example adding (eg) 10% to any particular product / pages combination, so these can be dealt with using the custom field option and a custom price plugin. This way, I can keep the total number of product variants manageable (Nicholas commented elsewhere on the forum that this was the way to deal with too many variants, as it's not really a situation that the variants set up is meant to handle).

The option / characteristic route doesn't really help either, as the option-variant is either a straight additional price (eg +£10), whatever the quantity, or we could use the % of main product price route, but this is a % of the "option product" not the product that I've allocated the option too (using the Hikademo as an example, it's a % of RAM rather than a % of the computer price).

I'm so close, as Hikashop deals rally well with every other aspect that I need, it's just finding a way to get the price to update taking into account the custom price adjustment, in the same way it does for variants.

Thank you though, I appreciate it.

Thanks Jerome, this looks like the best way to deal with it - I'll have a careful look. Meanwhile I'm working around it using variants, which is fine but not ideal. Appreciated.

Hello, I have a similar issue.
Have you been able to solve it using triggers?
when, in the product page, a user select an option of a custom field, is there a trigger generated dynamically ( by the hikashopToggleFields just function?) and which one?
I would appreciate some guidelines.

Hi Nicolas,
before even trying to update the price dynamicall; i have first to display the correct ones when loading the page.
I have created a table in database (i have made some changes in the admin/product to be able to input prices depending on the value of the custom fields) where I have price depending on a set of custom fields selected by the buyer.
I have tried to look inside several areas about the price/currency (including the class currency) and I need your "light".
Basically the question is where can I used my custom price table to calculate the actual price and "input it" into the right variable (which one) so that my new calculated price is displayed?

To give you some explanation on my custom prices: I have 3 custom fields :
a "Nb of evaluation" dropdown field : the customer can select among several values; each value triggers a different "base price"
a "detailed analysis" dropdown field: depending on the seleted value, the price increases the price given by the " Nb of evaluation" by X%
a "benchmark" dropdown field : depending on the choice here, there is an additional fix price (as an option).

Hi,

maybe I wanted to be to clever...or complicated.
For the dynamic part, I am fine.
my question was the "BEFORE" (where you suggest to use the default price) because the default price may no longer be the "default" when the custom fields items the price depend on are already "preselected" thanks to a variable passed through the url.
Of course, I could do a complete override of all the price functions but i would have liked to charge the right price before coming to the view.
So I would appreciate to know where I can modify the input price before the view is charged (because the loadTemplate() function doesn't tell me much). By knowing that, I assume it may also help me using the js for the dynamic change??

Hi Nicolas,

thanks for your advices. I will try to follow your recommendation about using a js.
But I am sorry, i realise I have more questions
1/ when the page is loading..where is that? I don't understand fully the architecture of this page; i have just understood that severals part of the page are loaded (listing_price, show_block_custom_item,..) but where is it that I know when the full page is loaded?;
or said in another way where can I put js? can i just put in anywhere in one of these views?

2/ what "price" should I modify. I see that the "listing_price" loads the "$this->row->prices as $k => $price" and then $price->unit_price.
is it this one that I should modify? and where then (what file/function/element)?

3/ Let's assume i can do that. When then the user selects a different "custom field value", i assume that the "hikashopToggleFields" function of the "show_block_custom_item" view will review the prices. But then i believe it will "destroy" my own values; So should i replace the "hikashopToggleFields" call by a call to my js function?

Sorry if my questions look stupid, but I am not really a developer, though i believe i am becoming, with the amount of work I put here ).
I just continue this post in englsh since we started in english, but I am not sure this is best (I believe it could be if someone is interested in it?)

Nicolas,

I can write in Js so I don't need so much info on it(though I am far from good,; this is why i asked about where I could put the test on the loaded page). Anyway thanks for your answer it guided me to realise that it was much simpler than i thought (I thought i needed to change price variables before they where displayed).

So I could write my js code successfully; I can change the price and display it correctly.

However my new price isn't taken into the cart.

I have noticed that the price isn't displayed with an element with an ID but "span" elements with ClassName 'hikashop_product_price".

I suspect then that the cart isn't using the price that is "displayed" but takes if from a variable? or is the price also in a "hidden" element in the page?

Can you please tell me what do i need to change, variable (but then isn't it weird to change a php/servier variable through js?), hidden element,... by my js code so that my new price is transfered to the cart?

Just to say thank you for you support on this topic (and another one). I could do what I wanted thanks to you.

Merry Christmas and Happy new year.
Richard