Setting flags

[mcmahanp]

I am trying to set the read-only flag on an environment, but the following code

env = create()
setindex!(env,0x20000,:Flags)

throws

ERROR: UndefVarError: warn not defined
Stacktrace:
 [1] setindex!(::Environment, ::UInt32, ::Symbol) at .julia/packages/LMDB/MBmCS/src/env.jl:123
 [2] top-level scope at REPL[131]:1

The other approach I tried was set!(env,0x20000), which throws

ERROR: Code[22]: Invalid argument
Stacktrace:
 [1] set!(::Environment, ::UInt32) at .julia/packages/LMDB/MBmCS/src/env.jl:87
 [2] top-level scope at REPL[144]:1

I'm brand new to Julia, so I'm not sure how to go about debugging this.

(using julia version 1.3.1)

[wildart]

Error message throws error. 💩. Thanks for reporting.

You cannot use :Flags symbol for setting up properties of the environment.
Only :Readers , :MapSize & :DB properties are available.

LMDB.jl/src/env.jl

Lines 114 to 127 in 637a483

	function setindex!(env::Environment, val::Cuint, option::Symbol)
	ret = zero(Cint)
	if option == :Readers
	ret = ccall( (:mdb_env_set_maxreaders, liblmdb), Cint, (Ptr{Nothing}, Cuint), env.handle, val)
	elseif option == :MapSize
	ret = ccall( (:mdb_env_set_mapsize, liblmdb), Cint, (Ptr{Nothing}, Cuint), env.handle, val)
	elseif option == :DBs
	ret = ccall( (:mdb_env_set_maxdbs, liblmdb), Cint, (Ptr{Nothing}, Cuint), env.handle, val)
	else
	warn("Cannot set $(string(option)) value")
	end
	(ret != 0) && throw(LMDBError(ret))
	return ret
	end

[mcmahanp]

Thanks for the reply. I was working off of the doc string, which I think suggests you can use :Flags:

LMDB.jl/src/env.jl

Lines 103 to 112 in 637a483

	`setindex!` accepts folowing parameters:
	* `env` db environment object
	* `option` symbol which indicates parameter. Currently supported parameters:
	* Flags
	* Readers
	* MapSize
	* DBs
	* `value` parameter value
	**Note:** Consult LMDB documentation for particual values of environment parameters and flags.

Is there any way to set the LMDB flags for an environment? I need both the RDONLY flag and the NORDAHEAD flag for my project.

[mcmahanp]

Quick followup:

I was able to set the environment flags by passing a flags argument to open() rather than setting them directly on the environment.