Laravel：如何制作列名的键？

Question

I'm bending my mind for some time now over this problem. Could someone please help me?

I have two tables: products and product_attributes. The product has all basic product information and product_attributes has all specific information for products on different categories. It's much like the magenta attribute system. this table has 4 columns: id, product_id, attribute_name, attribute_value.

Now let's say a product has 2 attributes:

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| id | product_id | attribute_name | attribute_value |
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| 1  | 123        | length         | 123cm           |
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| 2  | 123        | material       | Denim           |
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| 3  | 123        | season         | Summer          |
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Now if I set up the eloquent relationships and query a product, I get a product object with all three attributes. So far this is what I wanted. But now in a blade template I would like to be able to do something like this:

$product->attribute->length

Is this even possible or do I need to achieve these kind of things with a total different approach (like creating different tables for different product types/categories)?

Thanks in advance!

Answer 1

length is a tuple value not an attribute you need

$product->attribute->where('attribute_name', 'length')

or

$product->attribute->whereAttributeName('length')