angular5 ngx datatable error context

获取到api的数据，需要render 到datatable 上的时候出错，

取到的数据：是一个object

{"pool":[

{"pool_id":"2","libraries_library_id":"2"},

{"pool_id":"1","libraries_library_id":"1"}

]}

刷新页面：

 

PoolsDisplayComponent.html:5 ERROR TypeError: val.slice is not a function
at DatatableComponent.set [as rows] (index.js:2803)
at updateProp (core.js:12661)
at checkAndUpdateDirectiveInline (core.js:12368)
at checkAndUpdateNodeInline (core.js:13935)
at checkAndUpdateNode (core.js:13878)
at debugCheckAndUpdateNode (core.js:14771)
at debugCheckDirectivesFn (core.js:14712)
at Object.eval [as updateDirectives] (PoolsDisplayComponent.html:5)
at Object.debugUpdateDirectives [as updateDirectives] (core.js:14697)
at checkAndUpdateView (core.js:13844)
ERROR CONTEXT DebugContext_ {view: {…}, nodeIndex: 6, nodeDef: {…}, elDef: {…}, elView: {…}}

原因：

api返回的数据是object，而render datatable需要的是一个array

Typically the error you see happens when the data you try to render in the table is not Array type.

So in your case you have the object { feedData: [...array of objects...] }

And you need it to be: [...array of objects...]

refer： https://stackoverflow.com/questions/49997139/val-slice-is-not-a-function-error-in-ionic-3-angular-4-application