Content hash of a repository — repository

The repository analogue of model_hash(): a stable content hash of the repository with volatile bookkeeping stripped (every @misc, the inMemory flag, data.table's session-specific attributes). Identical content hashes identically; on-disk state and session history do not matter. As with models, a repository whose data slots were thinned to disk hashes differently from its in-memory original — hash before thinning (save_repository() does).

Usage

repository_hash(repo)

Arguments

repo: a repository object.

Value

character, the full hash (the store uses its first 8 characters).

Examples

repo <- newRepository("r", newCommodity("ELC", unit = "MWh"))
repository_hash(repo)
#> [1] "90c6e2abf5a6c5720e6c10b405cb8d9f"

# the hash follows the content: adding an object changes it
repository_hash(add(repo, newCommodity("COA", unit = "MMBtu")))
#> [1] "4c97faf9ed708b46f7a686e044d72449"