Does Mongo play a role in a Meteor application?

This code snippet appears to be related to MongoDB syntax, specifically in the context of a Meteor app:

const { selectedSectionId } = this.state;

                const assignmentsSelector = {
                    formativeId: this.props.formative._id,
                    $or: [{ public: true }],
                 };

                 if (selectedSectionId && selectedSectionId !== 'all') {
                    assignmentsSelector.$or.push({ sectionId: selectedSectionId });
                 }

Can you explain the purpose and function of the $or in the code above?

javascriptmongodb

Answer №1

In accordance with the MongoDB documentation:

According to the definition provided, the $or operator executes a logical OR operation on an array of two or more expressions, selecting documents that match at least one of the conditions.

It seems that the $or array in your assignmentsSelector only contains a condition to check if any document has a public property set to true. The conditional statement following the description of assignmentsSelector allows you to include additional conditions in the array so that the $or operator can function properly.

To learn more about the behavior of the $or operator, please refer to the documentation here.

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