rxdb db sample

Init:
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let collection = await db.collection({
    name: 'contacts',
    schema: contactsMeta.schema,
    migrationStrategies: contactsMeta.migrations,
    statics: contactsMeta.statics,
    methods: contactsMeta.methods,
  });
  middleware.preCreate(collection);
  await store.commit("contactsInitialCollection", collection);

schema:
--------------------------------------
schema: {
    title: "contacts",
    version: 0,
    type: "object",
    keyCompression: true,
    properties: {
      id: {
        type: "string",
        primary: true
      },
      name: {
        type: "string",
      },
      email: {
        type: "string",
      },
      phones: {
        type: "array",
        items: {
          type: "object"
        }
      },
      groups: {
        type: "array",
        items: {
          type: "object"
        }
      },
      created_at: {
        type: "string"
      }
    },
  },
  
 preCreate/insert (middleware):
 -------------------------------------------------------------  
 collection.preInsert(function(data){
      data.created_at = Date.now().toString();
      data.id = uuid()
    }, false);

    collection.preSave(function(data){
    }, false);
    

insert:
----------------------------------------
return collection.insert(data).then(response =>{
      if(response){
        return response.resource();
      }
    }).catch(error=>{
      throw error;
    })