Module Trakeva.Action (.ml)

module Action: sig .. end

type t =

`\|`	`Set of Trakeva.Key_in_collection.t * string`
`\|`	`Unset of Trakeva.Key_in_collection.t`
`\|`	`Sequence of t list`
`\|`	`Check of Trakeva.Key_in_collection.t * string option`	`(*`	An action is a transaction that (attempts) to modify the database.	`*)`

val set : ?collection:string -> key:string -> string -> t

Create a “set” action: set ~key v will add or set the value v for the key key, optionally in the collection collection.

val seq : t list -> t

Put a sequence of actions into a transaction.

val contains : ?collection:string -> key:string -> string -> t

An action that checks that the key is set in the DB and has the given value.

val is_not_set : ?collection:string -> string -> t

An action that checks that the key is not set in the DB.

val unset : ?collection:string -> string -> t

An actions that removes a value from the DB.

val to_string : t -> string

Convert the action to a display friendly string (the implementation is quite naive and not tail-recursive, hence avoid displaying huge transaction).