Multiple searches with with json_query/jmespath filter in Ansible - ansible

Question

I'm trying to parse out specifc subnet names in the following piece of json, while using contains_with or starts_with filters in json_query.
It contains two vnets each of which has multiple subnets:
{
"azure_virtualnetworks": [
{
"name": "test-vnet-172-17-0-0-19",
"properties": {
"subnets": [
{
"name": "test-confluent-subnet-172-17-0-0-28",
"properties": {
"addressPrefix": "172.20.88.0/28",
"networkSecurityGroup": {
"id": "/subscriptions/********/resourceGroups/test-confluent-rg/providers/Microsoft.Network/networkSecurityGroups/test-confluent-nsg"
},
"provisioningState": "Succeeded"
}
},
{
"name": "test-test-subnet-172-17-0-32-28",
"properties": {
"addressPrefix": "172.20.88.32/28",
"networkSecurityGroup": {
"id": "/subscriptions/********/resourceGroups/test-test-rg/providers/Microsoft.Network/networkSecurityGroups/test-test-nsg"
},
"provisioningState": "Succeeded"
}
}
]
}
},
{
"name": "test2-vnet-172-17-1-0-19",
"properties": {
"subnets": [
{
"name": "test-confluent-subnet-172-17-1-0-28",
"properties": {
"addressPrefix": "172.20.88.0/28",
"networkSecurityGroup": {
"id": "/subscriptions/********/resourceGroups/test-confluent-rg/providers/Microsoft.Network/networkSecurityGroups/test-confluent-nsg"
},
"provisioningState": "Succeeded"
}
},
{
"name": "test-qatesting-subnet-172-17-1-16-28",
"properties": {
"addressPrefix": "172.20.88.16/28",
"networkSecurityGroup": {
"id": "/subscriptions/********/resourceGroups/test-qatesting-rg/providers/Microsoft.Network/networkSecurityGroups/test-qatesting-nsg"
},
"provisioningState": "Succeeded"
}
}
]
}
}
]
}
I need to search for a subnet name after searching by virtual network name.
I can filter as far down as the list of subnets without problems. e.g
azure_virtualnetworks[?contains(name,`test2-vnet`)].properties.subnets[]
returns:
[
{
"name": "test-confluent-subnet-172-17-1-0-28",
"properties": {
"addressPrefix": "172.20.88.0/28",
"networkSecurityGroup": {
"id": "/subscriptions/********/resourceGroups/test-confluent-rg/providers/Microsoft.Network/networkSecurityGroups/test-confluent-nsg"
},
"provisioningState": "Succeeded"
}
},
{
"name": "test-qatesting-subnet-172-17-1-16-28",
"properties": {
"addressPrefix": "172.20.88.16/28",
"networkSecurityGroup": {
"id": "/subscriptions/********/resourceGroups/test-qatesting-rg/providers/Microsoft.Network/networkSecurityGroups/test-qatesting-nsg"
},
"provisioningState": "Succeeded"
}
}
]
However I'm having problems then searching the subnets. I had thought that some variation on following might work but haven't had any sucess:
azure_virtualnetworks[?contains(name,`test2-vnet`)].properties.subnets[?contains(name,`test-confluent`) ]
I'm struggling to figure out what the correcting syntax is here.

Answer 1

Select required subnets, stop projection with pipe expression, filter required items from the subnets list:
azure_virtualnetworks[?contains(name,`test2-vnet`)].properties.subnets[] | [?contains(name,`test-confluent`)]