fix(db): revert connect! fuction

User should have acces to his datascript connection. It allows him to create
database with schema, store it somewhere and do something else with it.

README.md

@@ -25,7 +25,7 @@ State management within *any* application, if treated as a secondary concern, ca
 Start a re-frame project and include this dependency:
 
 ```clj
-[re-posh "0.2.0"]
+[re-posh "0.3.0"]
 ```
 
 Require `re-posh` in your app:
@@ -35,6 +35,19 @@ Require `re-posh` in your app:
     [re-posh.core :refer [reg-query-sub reg-pull-sub reg-event-ds subscribe dispatch]]))
 ```
 
+## Connection
+
+Connect your DataScript database to `re-posh`:
+```clojure
+(ns example.db
+  (:require
+    [datascript.core    :as d]
+    [re-posh.core       :refer [connect!]]))
+
+(def conn (d/create-conn))
+(connect! conn)
+```
+
 ## Subscriptions
 
 You can subscribe to the DataScript database with a query subscription or with a pull subscription.

examples/todomvc/project.clj

@@ -2,7 +2,7 @@
   :dependencies [[org.clojure/clojure "1.8.0"]
                  [org.clojure/clojurescript "1.10.238"]
                  [reagent "0.8.1"]
-                 [re-posh "0.2.0"]]
+                 [re-posh "0.3.0"]]
 
   :plugins [[lein-cljsbuild "1.1.7"]]
 

examples/todomvc/src/cljs/todomvc/db.cljs

@@ -1,4 +1,6 @@
-(ns todomvc.db)
+(ns todomvc.db
+  (:require [datascript.core :as datascript]
+            [re-posh.core :as re-posh]))
 
 (def initial-db
   [{:db/id                        -1
@@ -15,3 +17,6 @@
     :task/title       "Have a coffe"
     :task/description "Just relax"
     :task/done?       false}])
+
+(def conn (datascript/create-conn))
+(re-posh/connect! conn)

project.clj

@@ -1,8 +1,9 @@
-(defproject re-posh "0.2.0"
+(defproject re-posh "0.3.0"
   :description "Use your re-frame with DataScript as a data storage"
   :url "https://github.com/denistakeda/re-posh"
   :license {:name "MIT"
             :url "https://opensource.org/licenses/MIT"}
   :dependencies [[org.clojure/clojure "1.9.0"]
+                 [datascript "0.16.6"]
                  [re-frame "0.10.5"]
                  [posh "0.5.5"]])

src/re_posh/core.cljc

@@ -4,12 +4,14 @@
     [re-posh.events :as events]
     [re-posh.effects]
     [re-posh.coeffects]
+    [re-posh.db :as db]
     [re-frame.core :as re-frame]))
 
 (def reg-query-sub subs/reg-query-sub)
 (def reg-pull-sub subs/reg-pull-sub)
 (def reg-sub subs/reg-sub)
 (def reg-event-ds events/reg-event-ds)
+(def connect! db/connect!)
 
 ;; Reexport re-frame functions
 (def subscribe re-frame/subscribe)

src/re_posh/db.cljc

@@ -1,17 +1,13 @@
 (ns re-posh.db
   (:require
-   [posh.reagent :as p]
-   [datascript.core :as datascript]))
+   [posh.reagent :as p]))
 
 ;; Basic store. This atom stores another atom
 ;; @store - datascript connection
 ;; @@store - datascript database
 (def store (atom nil))
 
-(defn- connect! []
+(defn connect! [conn]
   "Connect DataScript store to the re-frame event system"
-  (let [conn (datascript/create-conn)]
-    (p/posh! conn)
-    (reset! store conn)))
-
-(connect!)
+  (p/posh! conn)
+  (reset! store conn))