QueryFilter

open class QueryFilter : DataValue

Encapsulates the boolean value of an OData logical operator. Used to wrap the results of logical QueryOperator in a type-safe manner.

Example using proxy classes

open func queryWithFilterExample() throws -> Void {
    let service = self.service
    let query = DataQuery()
        .select(Customer.customerID, Customer.companyName, Customer.contactName)
        .filter(Customer.country.equal("Germany")
            .and(Customer.contactName.greaterEqual("N")))
    // Alternate syntax using convenience operators:
    // let query = DataQuery()
    //     .select(Customer.customerID, Customer.companyName, Customer.contactName)
    //     .filter(Customer.country == "Germany" && Customer.contactName >= "N")
    let customers = try service.fetchCustomers(matching: query)
    self.showCustomers(customers)
}

Example using dynamic API

open func queryWithFilterExample() throws -> Void {
    let service = self.service
    let customersEntitySet = service.entitySet(withName: "Customers")
    let customerEntityType = customersEntitySet.entityType
    let customerIDProperty = customerEntityType.property(withName: "CustomerID")
    let companyNameProperty = customerEntityType.property(withName: "CompanyName")
    let contactNameProperty = customerEntityType.property(withName: "ContactName")
    let countryProperty = customerEntityType.property(withName: "Country")
    let query = DataQuery()
        .select(customerIDProperty, companyNameProperty, contactNameProperty)
        .from(customersEntitySet)
        .filter(countryProperty.equal("Germany")
            .and(contactNameProperty.greaterEqual("N")))
    // Alternate syntax using convenience operators:
    // let query = DataQuery()
    //     .select(customerIDProperty, companyNameProperty, contactNameProperty)
    //     .from(customersEntitySet)
    //     .filter(countryProperty == "Germany" && contactNameProperty >= "N")
    let customers = try service.executeQuery(query).entityList()
    self.showCustomers(customers)
}