Add Calculated Field (For Product)
Let’s create a new empty custom field:
1. Open section “Setup fields”
2. Open section “Products”
3. Click button “Add Field”
4. Type custom meta key in text box (below the selects)
5. Fill “Column name”
5. Press button “Confirm”
In my example, I use “item_tax” as meta key on the screenshot
Then I moved new field from right column to left column (list of exported fields), pressed button “Preview” and see the zero values.
Then create a calculating function:
1. Close section “Setup fields” and open section “Misc Settings” (above it)
2. Mark checkbox “Custom PHP code to modify output”
3. Paste following draft function to the textarea
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add_filter('woe_get_order_product_value_FIELD', function ($value, $order, $item, $product,$item_meta) { $value = "text"; return $value; }, 10, 5); |
4. replace FIELD with your meta key (see 1st phase) .
5. replace $value = “text”; with your code.
Parameters for the hook:
$value is string
$order is WC_Order object
$item is WC_Order_Item_Product object
$product is WC_Product object
$item_meta is associative array
In this example, I use meta key “item_tax” and following code to calculate tax per item
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$value = $item['line_tax']/$item['qty']; |
I pressed button “Preview” and got necessary values
If button “Preview” has no effect, there is an error in the code!
So mark checkbox “Enable debug output” to see the errors.