What is the difference between "Money" and "Money!" in graphql schema?

[kenwhippcc5de5]

If we look at the vendor file in vendor/magento/module-catalog-graph-ql/etc/schema.graphqls which is defining the ProductInterface attributes.

Some objects had been defined as a "Money" and some are "Money!", so what is the difference?

[timon_heuser · Accepted solution]

Have a look at the graphql documentation: https://graphql.org/learn/schema/#object-types-and-fields

It says for the type String:

• String is one of the built-in scalar types - these are types that resolve to a single scalar object, and can't have sub-selections in the query. We'll go over scalar types more later.
• String! means that the field is non-nullable, meaning that the GraphQL service promises to always give you a value when you query this field. In the type language, we'll represent those with an exclamation mark.

So "Money" means that the object is nullable and "Money!" means it's not, that's it.

[dorothykonc8ea]

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[kapsgijexob9b7]

Thanks for the information!

[evelinakex7095]

Разница между `Money` и `Money!` в GraphQL схеме в том, что `Money` означает, что значение может быть либо указанным, либо `null`, тогда как `Money!` указывает на то, что значение обязательно и не может быть `null`. Если вы работаете с финансовыми данными, важно учитывать этот момент при проектировании схемы, чтобы избежать ошибок. Кстати, если вам интересна тема онлайн-казино, рекомендую посмотреть эту статью о выборе казино с большими коэффициентами и бонусами: vbalkhashe.kz/stati/polezno-znat/kak-vybrat-onlain-kazino-s-bolshim-kolic.html. Надеюсь, информация окажется полезной!