Support for "or" and "not" in tag queries

[Remich]

Hi,

I figured by trial and error (missing in documentation) that automatic links support the "and-operator": e.g.: [[z:zettels?tag=science&tag=math&timeline]]

It would also be nice to have support for "or" and "not" operators, and maybe parenthesis, in order to create arbitrarily complex search queries for auto-linking.

This would allow for a better auto-linking experience.

[srid]

We could add a q parameter to support complex queries, for example:

[[z:zettels?q="(tag:science OR tag:physics) -(tag:math)"]]

Which in flexible links of #312 would look like:

{{zettels | q = (tag:science OR tag:physics) -(tag:math) }}

[srid]

FTR, and / or differentiation is available in the code via the TagQuery type as of #500. That type will have to be enriched further in order to support this feature (at this point, however, the whole query thing must refactored into a plugin of its own).

[srid]

This should get implemented after #407

[s9gf4ult]

I would

{{zettels | q = (tag.science | tag.physics) & !(tag.math) }}

• & for AND
• | for OR
• ! for NOT
• () for brackets

Also, I would allow to query by arbitrary zettel's metadata.

Consider this meta

issue:
  status: "bug"

You could query it by

{{ zettels | q = issue.status = "bug" }}

So, there must be also

• " for string literals
• true false for boolean literals
• = for comparison of two metadata values

[srid]

Don't see the value of favouring C-like operators instead of using standard search query operators used by other apps and sites, but doing the below is a good idea.

I would allow to query by arbitrary zettel's metadata

[srid]

Closing per https://neuron.zettel.page/next ... to further discuss this idea, post in srid/emanote#48