View Source Dequel.Preloads (Dequel v0.7.0)
Extracts required preloads from a Dequel query.
Walks the AST and collects all relation references (dot notation and block syntax), returning an Ecto-compatible preload list.
Examples
Dot notation:
iex> Dequel.preloads("author.name:Tolkien")
[:author]Nested dot notation:
iex> Dequel.preloads("author.publisher.name:Penguin")
[author: :publisher]Block syntax:
iex> Dequel.preloads("tags{name:fiction}")
[:tags]Summary
Functions
Extracts preloads from a query string or parsed AST.
Functions
Extracts preloads from a query string or parsed AST.
Returns a list of preloads in Ecto-compatible format.
Examples
iex> Dequel.Preloads.extract("author.name:Tolkien")
[:author]
iex> Dequel.Preloads.extract("author.publisher.name:Penguin")
[author: :publisher]
iex> Dequel.Preloads.extract("tags{name:fiction}")
[:tags]
iex> Dequel.Preloads.extract("title:Rings")
[]
iex> Dequel.Preloads.extract("")
[]