.then(() => {
let maxLevel = Vue._(resources)
.map((resource) => resource.title.split('::').length)
.max() || 1
resourceLevels = Vue._(Vue._.range(maxLevel)).map((i) => ({
group: i !== 0,
field: `level_${i}`
}))
.value().reverse()
for (let id in resources) {
let columns = resources[id].title.split('::')
resources[id]['level_0'] = columns.pop()
Vue._(Vue._.range(1, maxLevel)).each((i) => {
let col = columns[maxLevel - 1 - i]
resources[id][`level_${i}`] = col === undefined ? '' : col
})
}
})