resource filters

Resource Filters

Resource filters can be passed to some Foam commands to limit their scope.

A filter supports the following parameters:

• tag: include a resource if it has the given tag (e.g. {"tag": "#research"})
• type: include a resource if it is of the given type (e.g. {"type": "daily-note"})
• path: include a resource if its path matches the given regex (e.g. {"path": "/projects/*"}). Note that this parameter supports regex and not globs.
• expression: include a resource if it makes the given expression true, where resource represents the resource being evaluated (e.g. {"expression": "resource.type ==='weekly-note'"})
• title: include a resource if the title matches the given regex (e.g. {"title": "Team meeting:*"})

A filter also supports some logical operators:

• and: include a resource if it matches all the sub-parameters (e.g {"and": [{"tag": "#research"}, {"title": "Paper *"}]})
• or: include a resource if it matches any of the sub-parameters (e.g {"or": [{"tag": "#research"}, {"title": "Paper *"}]})
• not: invert the result of the nested filter (e.g. {"not": {"type": "daily-note"}})

Here is an example of a complex filter, for example to show the Foam graph only of a subset of the workspace:

{
  "key": "alt+f",
  "command": "foam-vscode.show-graph",
  "args": {
    "filter": {
      "and": [
        {
          "or": [
            { "type": 'daily-note' },
            { "type": 'weekly-note' },
            { "path": '/projects/*' },
          ],
          "not": {
            { "tag": '#b' },
          },
        },
      ],
    }
  }
}