Create schema query predicates

schema_where_path() matches logical schema paths. schema_where_check() matches check nodes by kind.

Usage

schema_where_path(pattern, fixed = FALSE)

schema_where_check(kind = NULL)

Arguments

pattern

Pattern passed to grepl() for matching schema paths.

fixed

Whether pattern should be matched literally.

kind

Optional check kind to match, such as "list" or "int".

Value

A predicate function with signature function(path, node).

Details

schema_where_check() matches check nodes present in the schema tree being walked. It does not resolve $ref targets while querying an authoring SchemaDoc; use schema_flatten() first if a query should see referenced definitions through the flattened schema.

Examples

by_path <- schema_where_path("(^|\\$)`date-parts`\\$rest$")
by_int <- schema_where_check("int")

schema <- schema_infer(list(id = 1L))
schema
#> {
#>   "check": {
#>     "kind": "list"
#>   },
#>   "fields": {
#>     "id": {
#>       "check": {
#>         "kind": "int"
#>       }
#>     }
#>   }
#> }

schema_find(schema, by_int)
#> [1] "$id"