I am working on a scripts for creating a site hierarchy in Cisco DNA/Catalyst Center. I used an existing repo, that I’ve modified. I have structure that looks like this:

├── main.tf
├── variables.tf
├── modules 
│ └── site_settings 
│   └── site.tf 
│   └── variables.tf
├── Site-1
│ └── site-1.tfvars

In ./main.tf I have:

provider "dnacenter" {

    username = var.dnac_username
    password = var.dnac_password
    base_url = var.dnac_url
    debug = "true"
    ssl_verify = "false"
}

module "site_settings" {
  # Using m0_general_settings module to configure general settings
  source = "../modules/site_settings"

  global_name = var.global_name
  region_name = var.region_name
  country_name = var.country_name
  city_name = var.city_name
  site_name = var.site_name
  buildings = var.buildings
  building_name = var.building_name
}

The ./modules/site_settings/site.tf has:

  resource "dnacenter_area" "site" {
    depends_on = [ dnacenter_area.city ]
    provider = dnacenter
    parameters {
      site {
        area {
          name = var.site_name
          parent_name = "${var.parent_name}/${var.global_name}/${var.country_name}/${var.city_name}"
        }
      }
    type = "area"
    }
  }
  
resource "dnacenter_building" "building" {
  depends_on = [ dnacenter_area.site ]
  for_each = { for building in var.buildings : building.name => building }
  provider = dnacenter
  parameters {
    site {
      building {
        name        = "${each.value.name}"
        parent_name = "${var.global_name}/${var.region_name}/${var.country_name}/${var.city_name}/${each.value.parent_name}"
        latitude    = "${each.value.latitude}"
        longitude   = "${each.value.longitude}"
      }
    }
  type = "building"
  }
}

resource "dnacenter_floor" "floor" {
  depends_on = [ dnacenter_building.building ]
  for_each = { for floor in var.floors : floor.name => floor }
  provider = dnacenter
  parameters {
    site {
      floor {
        name        = "${each.value.name}"
        parent_name = "${var.global_name}/${var.region_name}/${var.country_name}/${var.city_name}/${each.value.parent_name}/${each.value.parent_building_name}"
      }
    }
  type = "floor"
  }
}

These are the varialbe values in ./site-1.tfvars :

dnac_username = "Cisco"
dnac_password = "Cisco123"
dnac_url = "https://my-dna-lab.test.net"
site_name = "Site-1"
buildings = [
{
building_name = "B01"
parent_site_name = "Site-1"
latitude = "xx.xxxx"
longitude = "xx.xxxx"
},
{
building_name = "B02"
parent_site_name = "Site-1"
latitude = "xx.xxxx"
longitude = "xx.xxxx"
},
]
floors = [
{
name = "F02"
parent_name = "Site-1"
parent_building_name = "B01"
},
{
name = "F03"
parent_name = "Site-1"
parent_building_name = "B01"
},
{
name = "F04"
parent_name = "Site-1"
parent_building_name = "B01"
},
{
name = "F03"
parent_name = "Site-1"
parent_building_name = "B02"
},
]

These are the variables defined in ./variables.tf

variable "dnac_username" {
    sensitive = true
}
variable "dnac_password" {
    sensitive = true
}
variable "dnac_url" {
  type = string
}
variable "site_name" {
  type = string
}
variable "global_name" {}
variable "buildings" {
  description = "List of buildings"
  type = list(object({
    name    = string
    parent_name = string
    latitude         = number
    longitude        = number
  }))
}
variable "floors" {
  description = "List of Floors"
  type = list(object({
    name    = string
    parent_name = string
    parent_building_name = string
  }))
}

And here are the vars in ./modules/site_settings/variables.tf:

variable "region_name" {
  type = string
}
variable "country_name" {
  type = string
}
variable "city_name" {
  type = string
}
variable "site_name" {
  type = string
}
variable "global_name" {}
variable "ip_pools" {}
variable "floors" {}
variable "buildings" {}

When I try to run the plan command, I get an error for duplicate values, since I have the same Floor name, which is in two different buildings.

Error: Duplicate object key
│ 
│   on modules/site_settings/site.tf line 90, in resource "dnacenter_floor" "floor":
│   90:   for_each = { for floor in var.floors : floor.name => floor }
│     ├────────────────
│     │ floor.name is "F03"
│ 
│ Two different items produced the key "F03" in this 'for' expression. If duplicates are expected, use the ellipsis (...) after the value expression to enable grouping by key.

How can I make this work, and create the floors as below? Can I somehow reference also the building in the floors for loop, or refence floor by ID (which is still not known)?

  # module.site_settings.dnacenter_building.building["B01"] will be created
  + resource "dnacenter_building" "building" {
      + id           = (known after apply)
      + item         = (known after apply)
      + last_updated = (known after apply)

      + parameters {
          + type = "building"

          + site {
              + building {
                  + address     = (known after apply)
                  + country     = (known after apply)
                  + latitude    = xx.xxxx
                  + longitude   = xx.xxxx
                  + name        = "B01"
                  + parent_name = "Global/EMEA/Spain/Madrid/Site-1"
                }
            }
        }
    }

  # module.site_settings.dnacenter_building.building["B02"] will be created
  + resource "dnacenter_building" "building" {
      + id           = (known after apply)
      + item         = (known after apply)
      + last_updated = (known after apply)

      + parameters {
          + type = "building"

          + site {
              + building {
                  + address     = (known after apply)
                  + country     = (known after apply)
                  + latitude    = xx.xxxx
                  + longitude   = xx.xxxx
                  + name        = "B02"
                  + parent_name = "Global/EMEA/Spain/Madrid/Site-1"
                }
            }
        }
    }



  # module.site_settings.dnacenter_floor.floor["F02"] will be created
  + resource "dnacenter_floor" "floor" {
      + id           = (known after apply)
      + item         = (known after apply)
      + last_updated = (known after apply)

      + parameters {
          + type = "floor"

          + site {
              + floor {
                  + floor_number = (known after apply)
                  + height       = (known after apply)
                  + length       = (known after apply)
                  + name         = "F02"
                  + parent_name  = "Global/EMEA/Spain/Madrid/Site-1/B01"
                  + rf_model     = (known after apply)
                  + width        = (known after apply)
                }
            }
        }
    }

  # module.site_settings.dnacenter_floor.floor["F03"] will be created
  + resource "dnacenter_floor" "floor" {
      + id           = (known after apply)
      + item         = (known after apply)
      + last_updated = (known after apply)

      + parameters {
          + type = "floor"

          + site {
              + floor {
                  + floor_number = (known after apply)
                  + height       = (known after apply)
                  + length       = (known after apply)
                  + name         = "F03"
                  + parent_name  = "Global/EMEA/Spain/Madrid/Site-1/B01"
                  + rf_model     = (known after apply)
                  + width        = (known after apply)
                }
            }
        }
    }

  # module.site_settings.dnacenter_floor.floor["F03"] will be created
  + resource "dnacenter_floor" "floor" {
      + id           = (known after apply)
      + item         = (known after apply)
      + last_updated = (known after apply)

      + parameters {
          + type = "floor"

          + site {
              + floor {
                  + floor_number = (known after apply)
                  + height       = (known after apply)
                  + length       = (known after apply)
**                  + name         = "F03"
                  + parent_name  = "Global/EMEA/Spain/Madrid/Site-1/B02"**
                  + rf_model     = (known after apply)
                  + width        = (known after apply)
                }
            }
        }
    }