Having a linkout per model/connection

[ntaylor1]

I have a Looker project that consists of multiple models and connections. I want to have a linkout to another dashboard that uses a particular connection each time. I have used the following:

dimension: city {
    type: string
    sql: ${TABLE}.city;;
    link: {
        label: "Drill by City"
        url: "/explore/model_name/explore_name?fields=users.email,users.id&f[users.city]=\"Santa Cruz, CA\"&sorts=users.email"
    }
}

 and created a view per connection/model for the dimensions that contain a linkout however I am receiving LookML warnings that say the following: 

LookML Warnings (1)

Toggle Error Section

There are some issues with this LookML code that will cause aspects of your data model to behave unexpectedly. These should be repaired to ensure your data model works as intended.

Expected value "view." in "_filters" to be a field name.

Has anyone done anything like this before and can help? 

For eg. I have done the following:

dimension: city {
    type: string
    sql: ${TABLE}.city;;
    link: {
        label: "Drill by City"
        url: "/dashboards/model_name_1/dashboard_name?fields=users.email,users.id&f[users.city]=\"Santa Cruz, CA\"&sorts=users.email"
    }
}

dimension: city {
    type: string
    sql: ${TABLE}.city;;
    link: {
        label: "Drill by City"
        url: "/dashboards/model_name_2/dashboard_name?fields=users.email,users.id&f[users.city]=\"Santa Cruz, CA\"&sorts=users.email"
    }
}