××あっての○○だ＝××がなければ○○は意味がない、××がなければ○○は存在できない という意味です。りしょきさんのはいい例文だと思います＾＾ ○○があってのことだ＝○○があったからそうしたのだ これは別の意味になるので気をつけてください。

something１　あっての　something2 something 2 work or exist(or run, consists of etc . there are several possibility so that work or exist are suitabele to get meaning, I guess) because of exsitance of something 1 My English explanation might be wired, so, please recorrect if it is strange. Anyway, (good) working or existance of something2 need sufficient working or existance of something1. Something 1 is precondition or underling something2. If there is a sentence which is not apply this, please tell me, thank you.

学生あっての学校　It can be called school ,because It has students 学生がいる学校　　there are students in the school I'm a chinese people so 有……才…… is chinese word my English is poor so I couldn't say it in English I'm sorry

たとえば　学生あっての学校　It can be called school ,because It has students 私を見捨てないでください、あなたあっての私なんだから、please don't leave me , I can't live without you . 有……才……

彼は何も君に悪意があってのことではありません。＝He meant no harm to you. なんの気なしに言っただけで、別に悪気があってのことではありません。＝I just said so without thinking much about it, butI didn't mean anything serious.