Parameterized queries

Hello,

I would like to be able to use an attribute of the parent block when writing an SQL query in an embed block. For the sake of example, consider I am in the document Trip to the Moon​ and I want to make a query that collects links to it. I would write

select b.* from blocks as b where b.content like "%trip to the moon%" order by updated desc

But I am already in Trip to the Moon​ (a document or a parent block with that name), so ideally I would like to grab the current document's title/name. I would like to replace the literal string "%trip to the moon%"​ with something like :parent.title​. How can I achieve this?

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    • 88250

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    • alvorithm
      VIP Warrior Author

      Hi again,

      I am wondering if using Javascript in the embed block could help here. Because I only get a partial translation and I don't know JS, I don't follow much of what is discussed in the feature request with issue number 9648, proposed by @frostime

      @frostime -- wout be possible to dynamically acquire metadata from the environment (current notebook/doc, preceding block, enclosing superblock) for use in a query by using the new //!js embed functionality?

    • ciwoyipang 2

      You can use the Query Widget which will automatically bring out the path

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      1 Reply
    • alvorithm
      VIP Warrior Author

      Dear @ciwoyipang, thank you so much for making me aware of the query widget. It is a very featureful extension. But I think I did not describe my need clearly. What I am after is that the query block asks its parent for the text "trip to the moon", i.e. that string in the query should be generated automatically from the context.

      select * from blocks as b where b.content like "%insert here the title or the name of the parent block%"

      So if I put this query inside a document named "The mother of all queries" it would automatically fill in the value and execute

      select * from blocks as b where b.content like "%The mother of all queries%"

      Do you have an idea on how to customize queries based on the context of the query block (e.g. the parent, or the preceding block)?

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      PS. in order to have the type column values translated, is it necessary to do it in Siyuan or in the widget code?

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