com.walmartlabs.lacinia.executor — com.walmartlabs/lacinia 0.31.0

Mechanisms for executing parsed queries against compiled schemas.

execute-query clj

(execute-query context)

Entrypoint for execution of a query.

Expects the context to contain the schema and parsed query.

Returns a ResolverResult that will deliver the result map.

This should generally not be invoked by user code; see [[execute-parsed-query]].

invoke-streamer clj

(invoke-streamer context source-stream)

Given a parsed and prepared query (inside the context, as with execute-query), this will locate the streamer for a subscription and invoke it, passing it the context, the subscription arguments, and the source stream.

selections-seq clj

(selections-seq context)

A width-first traversal of selections tree, returning a lazy sequence of qualified field names. A qualified field name is a namespaced keyword, the namespace is the containing type, e.g. :User/name.

selections-tree clj

(selections-tree context)

Constructs a tree of the selections below the current field.

Returns a map where the keys are qualified field names (the selections for this field). For each such field is a map with two optional keys; :args and :selections. :args is the arguments that will be passed to that field's resolver. :selections is the nested selection tree.

Each key is present only if value is provided; for scalar fields with no arguments, the value will be nil.

Fragments are flattened into containing fields, as with selections-seq.

selects-field? clj

(selects-field? context field-name)

Invoked by a field resolver to determine if a particular field is selected anywhere within the selection tree (that is, at any depth).